The document discusses ions and ionic bonding. It defines ions as atoms that have gained or lost electrons to become positively or negatively charged. Cations are positively charged ions that form when metals lose electrons, while anions are negatively charged ions that form when nonmetals gain electrons. The octet rule states that atoms seek to attain eight electrons in their valence shell. Ionic compounds form when cations and anions bond via electrostatic attraction to yield an electrically neutral compound. Transition metals can form ions with multiple possible charges. Ionic compounds have properties like crystalline structures, high melting points, and conductivity when dissolved in water.
An ion is an atom or molecule which has lost or gained one or more valence electrons, giving it a positive or negative electrical charge
Ions are formed by the loss or gain of electrons by single atoms or groups of atoms.
This presentation was put together by Ivan Ukiwah.
Seminar of U.V. Spectroscopy by SAMIR PANDASAMIR PANDA
Spectroscopy is a branch of science dealing the study of interaction of electromagnetic radiation with matter.
Ultraviolet-visible spectroscopy refers to absorption spectroscopy or reflect spectroscopy in the UV-VIS spectral region.
Ultraviolet-visible spectroscopy is an analytical method that can measure the amount of light received by the analyte.
A brief information about the SCOP protein database used in bioinformatics.
The Structural Classification of Proteins (SCOP) database is a comprehensive and authoritative resource for the structural and evolutionary relationships of proteins. It provides a detailed and curated classification of protein structures, grouping them into families, superfamilies, and folds based on their structural and sequence similarities.
This presentation explores a brief idea about the structural and functional attributes of nucleotides, the structure and function of genetic materials along with the impact of UV rays and pH upon them.
Introduction:
RNA interference (RNAi) or Post-Transcriptional Gene Silencing (PTGS) is an important biological process for modulating eukaryotic gene expression.
It is highly conserved process of posttranscriptional gene silencing by which double stranded RNA (dsRNA) causes sequence-specific degradation of mRNA sequences.
dsRNA-induced gene silencing (RNAi) is reported in a wide range of eukaryotes ranging from worms, insects, mammals and plants.
This process mediates resistance to both endogenous parasitic and exogenous pathogenic nucleic acids, and regulates the expression of protein-coding genes.
What are small ncRNAs?
micro RNA (miRNA)
short interfering RNA (siRNA)
Properties of small non-coding RNA:
Involved in silencing mRNA transcripts.
Called “small” because they are usually only about 21-24 nucleotides long.
Synthesized by first cutting up longer precursor sequences (like the 61nt one that Lee discovered).
Silence an mRNA by base pairing with some sequence on the mRNA.
Discovery of siRNA?
The first small RNA:
In 1993 Rosalind Lee (Victor Ambros lab) was studying a non- coding gene in C. elegans, lin-4, that was involved in silencing of another gene, lin-14, at the appropriate time in the
development of the worm C. elegans.
Two small transcripts of lin-4 (22nt and 61nt) were found to be complementary to a sequence in the 3' UTR of lin-14.
Because lin-4 encoded no protein, she deduced that it must be these transcripts that are causing the silencing by RNA-RNA interactions.
Types of RNAi ( non coding RNA)
MiRNA
Length (23-25 nt)
Trans acting
Binds with target MRNA in mismatch
Translation inhibition
Si RNA
Length 21 nt.
Cis acting
Bind with target Mrna in perfect complementary sequence
Piwi-RNA
Length ; 25 to 36 nt.
Expressed in Germ Cells
Regulates trnasposomes activity
MECHANISM OF RNAI:
First the double-stranded RNA teams up with a protein complex named Dicer, which cuts the long RNA into short pieces.
Then another protein complex called RISC (RNA-induced silencing complex) discards one of the two RNA strands.
The RISC-docked, single-stranded RNA then pairs with the homologous mRNA and destroys it.
THE RISC COMPLEX:
RISC is large(>500kD) RNA multi- protein Binding complex which triggers MRNA degradation in response to MRNA
Unwinding of double stranded Si RNA by ATP independent Helicase
Active component of RISC is Ago proteins( ENDONUCLEASE) which cleave target MRNA.
DICER: endonuclease (RNase Family III)
Argonaute: Central Component of the RNA-Induced Silencing Complex (RISC)
One strand of the dsRNA produced by Dicer is retained in the RISC complex in association with Argonaute
ARGONAUTE PROTEIN :
1.PAZ(PIWI/Argonaute/ Zwille)- Recognition of target MRNA
2.PIWI (p-element induced wimpy Testis)- breaks Phosphodiester bond of mRNA.)RNAse H activity.
MiRNA:
The Double-stranded RNAs are naturally produced in eukaryotic cells during development, and they have a key role in regulating gene expression .
Cancer cell metabolism: special Reference to Lactate PathwayAADYARAJPANDEY1
Normal Cell Metabolism:
Cellular respiration describes the series of steps that cells use to break down sugar and other chemicals to get the energy we need to function.
Energy is stored in the bonds of glucose and when glucose is broken down, much of that energy is released.
Cell utilize energy in the form of ATP.
The first step of respiration is called glycolysis. In a series of steps, glycolysis breaks glucose into two smaller molecules - a chemical called pyruvate. A small amount of ATP is formed during this process.
Most healthy cells continue the breakdown in a second process, called the Kreb's cycle. The Kreb's cycle allows cells to “burn” the pyruvates made in glycolysis to get more ATP.
The last step in the breakdown of glucose is called oxidative phosphorylation (Ox-Phos).
It takes place in specialized cell structures called mitochondria. This process produces a large amount of ATP. Importantly, cells need oxygen to complete oxidative phosphorylation.
If a cell completes only glycolysis, only 2 molecules of ATP are made per glucose. However, if the cell completes the entire respiration process (glycolysis - Kreb's - oxidative phosphorylation), about 36 molecules of ATP are created, giving it much more energy to use.
IN CANCER CELL:
Unlike healthy cells that "burn" the entire molecule of sugar to capture a large amount of energy as ATP, cancer cells are wasteful.
Cancer cells only partially break down sugar molecules. They overuse the first step of respiration, glycolysis. They frequently do not complete the second step, oxidative phosphorylation.
This results in only 2 molecules of ATP per each glucose molecule instead of the 36 or so ATPs healthy cells gain. As a result, cancer cells need to use a lot more sugar molecules to get enough energy to survive.
Unlike healthy cells that "burn" the entire molecule of sugar to capture a large amount of energy as ATP, cancer cells are wasteful.
Cancer cells only partially break down sugar molecules. They overuse the first step of respiration, glycolysis. They frequently do not complete the second step, oxidative phosphorylation.
This results in only 2 molecules of ATP per each glucose molecule instead of the 36 or so ATPs healthy cells gain. As a result, cancer cells need to use a lot more sugar molecules to get enough energy to survive.
introduction to WARBERG PHENOMENA:
WARBURG EFFECT Usually, cancer cells are highly glycolytic (glucose addiction) and take up more glucose than do normal cells from outside.
Otto Heinrich Warburg (; 8 October 1883 – 1 August 1970) In 1931 was awarded the Nobel Prize in Physiology for his "discovery of the nature and mode of action of the respiratory enzyme.
WARNBURG EFFECT : cancer cells under aerobic (well-oxygenated) conditions to metabolize glucose to lactate (aerobic glycolysis) is known as the Warburg effect. Warburg made the observation that tumor slices consume glucose and secrete lactate at a higher rate than normal tissues.
Deep Behavioral Phenotyping in Systems Neuroscience for Functional Atlasing a...Ana Luísa Pinho
Functional Magnetic Resonance Imaging (fMRI) provides means to characterize brain activations in response to behavior. However, cognitive neuroscience has been limited to group-level effects referring to the performance of specific tasks. To obtain the functional profile of elementary cognitive mechanisms, the combination of brain responses to many tasks is required. Yet, to date, both structural atlases and parcellation-based activations do not fully account for cognitive function and still present several limitations. Further, they do not adapt overall to individual characteristics. In this talk, I will give an account of deep-behavioral phenotyping strategies, namely data-driven methods in large task-fMRI datasets, to optimize functional brain-data collection and improve inference of effects-of-interest related to mental processes. Key to this approach is the employment of fast multi-functional paradigms rich on features that can be well parametrized and, consequently, facilitate the creation of psycho-physiological constructs to be modelled with imaging data. Particular emphasis will be given to music stimuli when studying high-order cognitive mechanisms, due to their ecological nature and quality to enable complex behavior compounded by discrete entities. I will also discuss how deep-behavioral phenotyping and individualized models applied to neuroimaging data can better account for the subject-specific organization of domain-general cognitive systems in the human brain. Finally, the accumulation of functional brain signatures brings the possibility to clarify relationships among tasks and create a univocal link between brain systems and mental functions through: (1) the development of ontologies proposing an organization of cognitive processes; and (2) brain-network taxonomies describing functional specialization. To this end, tools to improve commensurability in cognitive science are necessary, such as public repositories, ontology-based platforms and automated meta-analysis tools. I will thus discuss some brain-atlasing resources currently under development, and their applicability in cognitive as well as clinical neuroscience.
Observation of Io’s Resurfacing via Plume Deposition Using Ground-based Adapt...Sérgio Sacani
Since volcanic activity was first discovered on Io from Voyager images in 1979, changes
on Io’s surface have been monitored from both spacecraft and ground-based telescopes.
Here, we present the highest spatial resolution images of Io ever obtained from a groundbased telescope. These images, acquired by the SHARK-VIS instrument on the Large
Binocular Telescope, show evidence of a major resurfacing event on Io’s trailing hemisphere. When compared to the most recent spacecraft images, the SHARK-VIS images
show that a plume deposit from a powerful eruption at Pillan Patera has covered part
of the long-lived Pele plume deposit. Although this type of resurfacing event may be common on Io, few have been detected due to the rarity of spacecraft visits and the previously low spatial resolution available from Earth-based telescopes. The SHARK-VIS instrument ushers in a new era of high resolution imaging of Io’s surface using adaptive
optics at visible wavelengths.
2. Representative ElementsRepresentative Elements
All elements in “A”All elements in “A”
groups of P.T.groups of P.T.
Wide range ofWide range of
physical/chemicalphysical/chemical
propertiesproperties
All elements exceptAll elements except
transition metals andtransition metals and
inner transition metalsinner transition metals
3. Valence ElectronsValence Electrons
Electrons on the highestElectrons on the highest
primary energy levelprimary energy level
(highest number)(highest number)
Corresponds to groupCorresponds to group
number of representativenumber of representative
elementselements
__??_ is the only exception_ is the only exception
4. Lewis StructureLewis Structure
a.k.a. “Electron Dot Structure”a.k.a. “Electron Dot Structure”
Shows valence electrons asShows valence electrons as
dots around andots around an
atom’s symbolatom’s symbol
Valence electronsValence electrons
only electrons usedonly electrons used
in chemical bondingin chemical bonding
5. The maximum number of electrons an elementThe maximum number of electrons an element
can have in its outer shell is…can have in its outer shell is…
6. The Octet RuleThe Octet Rule
The maximum number of electrons an elementThe maximum number of electrons an element
can have in its valence energy level is…can have in its valence energy level is…
EIGHT!EIGHT!
7. The Octet RuleThe Octet Rule
Often, atoms tend to lose orOften, atoms tend to lose or
gain electrons in order togain electrons in order to
form a complete octet, whichform a complete octet, which
makes the atom most stablemakes the atom most stable
Metals (few valence electrons)Metals (few valence electrons)
lose electronslose electrons
Nonmetals (many valenceNonmetals (many valence
electrons)electrons) gain electronsgain electrons
8. The Octet RuleThe Octet Rule
When atoms lose/gainWhen atoms lose/gain
electrons, they take onelectrons, they take on
the electronthe electron
configuration of a nobleconfiguration of a noble
gasgas
9. IonsIons
Ion – atom with a positive or negative charge (lost orIon – atom with a positive or negative charge (lost or
gained an electron)gained an electron)
10. IonsIons
Ions that lose an electron, or multiple electrons,Ions that lose an electron, or multiple electrons,
become positively charged (and are calledbecome positively charged (and are called
CATIONSCATIONS).). Metals!Metals!
Ions that gain an electron, or multiple electrons,Ions that gain an electron, or multiple electrons,
become negatively charged (and are calledbecome negatively charged (and are called
ANIONSANIONS).). Nonmetals!Nonmetals!
11. Answer these questions:Answer these questions:
How many TOTAL electrons does oxygen have?How many TOTAL electrons does oxygen have?
How many valence electrons does oxygen have?How many valence electrons does oxygen have?
How many electrons must oxygen gain/lose to form aHow many electrons must oxygen gain/lose to form a
complete octet?complete octet?
Does this make oxygen positively- or negatively-charged?Does this make oxygen positively- or negatively-charged?
What is theWhat is the exactexact charge on the oxygen ion?charge on the oxygen ion?
Is the oxygen ion a cation or an anion?Is the oxygen ion a cation or an anion?
12. Example 1Example 1
Fluorine has 9 electrons. (7 in valence level)Fluorine has 9 electrons. (7 in valence level)
As it ionizes (becomes an ion), what shouldAs it ionizes (becomes an ion), what should
happen?happen?
What is the charge on the ion?What is the charge on the ion?
FIRST, DRAW THE LEWIS STRUCTURE!FIRST, DRAW THE LEWIS STRUCTURE!
13. Example 2Example 2
Nitrogen has 7 electrons (5 in valence level)Nitrogen has 7 electrons (5 in valence level)
As it ionizes, what should happen?As it ionizes, what should happen?
What is the charge on the ion?What is the charge on the ion?
14. Example 3Example 3
Indium (In) has 49 electrons.Indium (In) has 49 electrons.
As it ionizes, what should happen?As it ionizes, what should happen?
What is the charge on the ion?What is the charge on the ion?
16. Group
Number
Example
Elements
Name of
Group (if
any)
# of
Valence
Electrons
# of
Electrons
Gained or
Lost to
Form Ion
Ionic
Charge
Cation or
Anion?
1A Lithium,
Potassium
Alkali
Metals
1 Lose 1 +1 Cation
2A
3A
4A
5A
6A
7A
8A
17. Group
Number
Example
Elements
Name of
Group (if
any)
# of
Valence
Electrons
# of
Electrons
Gained or
Lost to
Form Ion
Ionic
Charge
Cation or
Anion?
1A Lithium,
Potassium
Alkali
Metals
1 Lose 1 +1 Cation
2A Magnesium,
Calcium
Alkali Earth
Metals
2 Lose 2 +2 Cation
3A
4A
5A
6A
7A
8A
18. Group
Number
Example
Elements
Name of
Group (if
any)
# of
Valence
Electrons
# of
Electrons
Gained or
Lost to
Form Ion
Ionic
Charge
Cation or
Anion?
1A Lithium,
Potassium
Alkali
Metals
1 Lose 1 +1 Cation
2A Magnesium,
Calcium
Alkali Earth
Metals
2 Lose 2 +2 Cation
3A Aluminum 3 Lose 3 +3 Cation
4A
5A
6A
7A
8A
19. Group
Number
Example
Elements
Name of
Group (if
any)
# of
Valence
Electrons
# of
Electrons
Gained or
Lost to
Form Ion
Ionic
Charge
Cation or
Anion?
1A Lithium,
Potassium
Alkali
Metals
1 Lose 1 +1 Cation
2A Magnesium,
Calcium
Alkali Earth
Metals
2 Lose 2 +2 Cation
3A Aluminum 3 Lose 3 +3 Cation
4A Carbon,
Lead, Tin
4 Lose 4 /
Gain 4
+4 / -4 Cation /
Anion
5A
6A
7A
8A
20. Group
Number
Example
Elements
Name of
Group (if
any)
# of
Valence
Electrons
# of
Electrons
Gained or
Lost to
Form Ion
Ionic
Charge
Cation or
Anion?
1A Lithium,
Potassium
Alkali
Metals
1 Lose 1 +1 Cation
2A Magnesium,
Calcium
Alkali Earth
Metals
2 Lose 2 +2 Cation
3A Aluminum 3 Lose 3 +3 Cation
4A Carbon,
Lead, Tin
4 Lose 4 /
Gain 4
+4 / -4 Cation /
Anion
5A Nitrogen,
Phosphorus
5 Gain 3 -3 Anion
6A
7A
8A
21. Group
Number
Example
Elements
Name of
Group (if
any)
# of
Valence
Electrons
# of
Electrons
Gained or
Lost to
Form Ion
Ionic
Charge
Cation or
Anion?
1A Lithium,
Potassium
Alkali
Metals
1 Lose 1 +1 Cation
2A Magnesium,
Calcium
Alkali Earth
Metals
2 Lose 2 +2 Cation
3A Aluminum 3 Lose 3 +3 Cation
4A Carbon,
Lead, Tin
4 Lose 4 /
Gain 4
+4 / -4 Cation /
Anion
5A Nitrogen,
Phosphorus
5 Gain 3 -3 Anion
6A Oxygen,
Sulfur
6 Gain 2 -2 Anion
7A
8A
22. Group
Number
Example
Elements
Name of
Group (if
any)
# of
Valence
Electrons
# of
Electrons
Gained or
Lost to
Form Ion
Ionic
Charge
Cation or
Anion?
1A Lithium,
Potassium
Alkali
Metals
1 Lose 1 +1 Cation
2A Magnesium,
Calcium
Alkali Earth
Metals
2 Lose 2 +2 Cation
3A Aluminum 3 Lose 3 +3 Cation
4A Carbon,
Lead, Tin
4 Lose 4 /
Gain 4
+4 / -4 Cation /
Anion
5A Nitrogen,
Phosphorus
5 Gain 3 -3 Anion
6A Oxygen,
Sulfur
6 Gain 2 -2 Anion
7A Chlorine,
Bromine
Halogens 7 Gain 1 -1 Anion
8A
23. Group
Number
Example
Elements
Name of
Group (if
any)
# of
Valence
Electrons
# of
Electrons
Gained or
Lost to
Form Ion
Ionic
Charge
Cation or
Anion?
1A Lithium,
Potassium
Alkali
Metals
1 Lose 1 +1 Cation
2A Magnesium,
Calcium
Alkali Earth
Metals
2 Lose 2 +2 Cation
3A Aluminum 3 Lose 3 +3 Cation
4A Carbon,
Lead, Tin
4 Lose 4 /
Gain 4
+4 / -4 Cation /
Anion
5A Nitrogen,
Phosphorus
5 Gain 3 -3 Anion
6A Oxygen,
Sulfur
6 Gain 2 -2 Anion
7A Chlorine,
Bromine
Halogens 7 Gain 1 -1 Anion
8A Neon,
Radon
Noble
Gases
8 0 No charge
24. Group
Number
Example
Elements
Name of
Group (if
any)
# of
Valence
Electrons
# of
Electrons
Gained or
Lost to
Form Ion
Ionic
Charge
Cation or
Anion?
1A Lithium,
Potassium
Alkali
Metals
1 Lose 1 +1 Cation
2A Magnesium,
Calcium
Alkali Earth
Metals
2 Lose 2 +2 Cation
3A Aluminum 3 Lose 3 +3 Cation
4A Carbon,
Lead, Tin
4 Lose 4 /
Gain 4
+4 / -4 Cation /
Anion
5A Nitrogen,
Phosphorus
5 Gain 3 -3 Anion
6A Oxygen,
Sulfur
6 Gain 2 -2 Anion
7A Chlorine,
Bromine
Halogens 7 Gain 1 -1 Anion
8A Neon,
Radon
Noble
Gases
8 0 No charge
25. Write Ions of These Elements:Write Ions of These Elements:
BariumBarium
ChlorineChlorine
PhosphorusPhosphorus
Lead cationLead cation
AluminumAluminum
Indium (In)Indium (In)
Krypton (Kr)Krypton (Kr)
HydrogenHydrogen
26. Answer all questions.Answer all questions.
MagnesiumMagnesium
BromineBromine
SulfurSulfur
PotassiumPotassium
AluminumAluminum
NitrogenNitrogen
27. As Fluorine becomes an ion, what happens?As Fluorine becomes an ion, what happens?
Gain 1 electronGain 1 electron
Gain 2 electronsGain 2 electrons
Gain 3 electronsGain 3 electrons
Lose 1 electronLose 1 electron
28. Polyatomic IonsPolyatomic Ions
Ions composed of moreIons composed of more
than one tightly-bondedthan one tightly-bonded
atomsatoms
Usually have a negativeUsually have a negative
chargecharge
Usually end in –ite or –Usually end in –ite or –
ate, meaning that there isate, meaning that there is
oxygen in the ionoxygen in the ion
36. Write the FormulaWrite the Formula
Potassium and ChlorinePotassium and Chlorine
Magnesium and OxygenMagnesium and Oxygen
Sodium and PhosphorusSodium and Phosphorus
Barium and PhosphorusBarium and Phosphorus
37. Vocabulary
Ionic Bond – the
electrostatic forces that
hold ions together
Chemical Formula –
shows the kinds and
numbers of ions;
represents ratio called a
“formula unit”
38. Transition MetalsTransition Metals
Ions of manyIons of many
transition metals cantransition metals can
take on multipletake on multiple
chargescharges
Ex: Chromium +2,Ex: Chromium +2,
+3, +6+3, +6
39. Transition MetalsTransition Metals
Ionic charge designated by Roman NumeralIonic charge designated by Roman Numeral
Copper (III) is CuCopper (III) is Cu 3+3+
40. More Examples
Aluminum and Sulfur
Lead (IV) and Bromine
Mercury (II) and Iodine
Strontium (Sr) and Oxygen
Iron (III) and Oxygen
41. Properties of Ionic Compounds
Crystalline solids at room
temperature
Atoms arranged in
repeating, three-dimensional
patterns
42. Properties of Ionic Compounds
Extremely high melting
points
Conduct electric current
when dissolved in water
43. Names of IonsNames of Ions
Anions (negative) areAnions (negative) are
named by adding “-ide” tonamed by adding “-ide” to
their elemental names.their elemental names.
Cl = chlorineCl = chlorine
ClCl--
= chloride ion= chloride ion
44. Ions of Transition Metals
REMEMBER: Transition
metal ions are named for their
charge
Fe2+
called iron (II) ion
Fe3+
called iron (III) ion
45. Ions of Transition Metals
Also must occur for some non-transition metals: Tin
and Lead
46. Write the Formula for These Compounds!
1. Mercury(II) Iodide
2. Sodium Carbonate
3. Copper(II) Oxide
4. Potassium Oxide
5. Barium Sulfate
6. Berrylium (Be) Nitride
7. Manganese(III) Iodide
8. Tin(IV) Phosphate
9. Ammonium Sulfide
10. Titanium(II) Hydroxide
48. 1.1. Draw the LewisDraw the Lewis
structure for Nitrogen.structure for Nitrogen.
2.2. What is the octet rule?What is the octet rule?
3.3. How many electronsHow many electrons
would be lost/gained bywould be lost/gained by
a Calcium ion as ita Calcium ion as it
ionizes?ionizes?
4.4. Name two properties ofName two properties of
ionic compounds.ionic compounds.
5.5. Write the formula for:Write the formula for:
Sodium and NitrogenSodium and Nitrogen
Iron (III) and OxygenIron (III) and Oxygen
Magnesium and NitrateMagnesium and Nitrate
50. Types of QuestionsTypes of Questions
Write a formula givenWrite a formula given
the name of an ionicthe name of an ionic
compound.compound.
Write the name of anWrite the name of an
ionic compoundionic compound
given the formula.given the formula.
51. Ionic Compound NamesIonic Compound Names
Write cation first.Write cation first.
Add Roman numeral for transitionAdd Roman numeral for transition
metals, tin, and lead.metals, tin, and lead.
Write anion second, adding “-ide”Write anion second, adding “-ide”
to the element.to the element.
Leave polyatomic ion names alone.Leave polyatomic ion names alone.
52. (Use Polyatomic Ion List…)(Use Polyatomic Ion List…)
CaCa22COCO33
AlAl22OO33
CuFCuF22
AgNOAgNO33
53. 1.1. Why are some elementsWhy are some elements
more stable as ions than asmore stable as ions than as
atoms?atoms?
2.2. Write the formulas andWrite the formulas and
describe the majordescribe the major
difference between copper(I)difference between copper(I)
nitride and copper(II) nitride.nitride and copper(II) nitride.
3.3. Criticize this statement: “TheCriticize this statement: “The
ionic charge of any metalionic charge of any metal
may be determined from themay be determined from the
position of the element inposition of the element in
the periodic table.”the periodic table.”
4.4. Explain what is wrong withExplain what is wrong with
each ionic formula:each ionic formula:
CsClCsCl22 BrOBrO22
LiNeLiNe BaBa22SS22
5.5. Lead (IV) PhosphateLead (IV) Phosphate
6.6. Barium IodideBarium Iodide
7.7. Mercury (I) OxideMercury (I) Oxide
8.8. Ammonium CarbonateAmmonium Carbonate
9. AlNO3
10. SnF4
11. Mn3N2
12. ZnS
Cation
Anion
A B C D
M MA2 (13) (14) MD
N (15) N4B (16) (17)
P PA3 (18) PC P2(D)3