Ions And Naming
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When atoms or molecules gain or lose electrons, they form ions. Positively charged ions are called cations, and negatively charged ions are called anions. Groups of atoms can also carry a charge and are called polyatomic ions. Ionic compounds are named by combining the name of the cation and anion. Binary molecular compounds are systematically named using Greek prefixes and suffixes that indicate the number of atoms in the compound.
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This document discusses the rules for naming ionic compounds, covalent compounds, and compounds containing transition metals. It provides examples of naming compounds from their formulas, such as sodium hydroxide (NaOH), lithium sulfide (Li2S), and iron(III) chloride (FeCl3). It also gives examples of writing formulas from compound names, like beryllium chloride (BeCl2), copper(I) oxide (Cu2O), and diphosphorus pentoxide (P2O5).
BINARY IONIC COMPOUND.pptx
This document provides information on binary compounds and ionic compounds containing polyatomic ions. It defines binary compounds as those containing only two elements and ionic binary compounds as those where one element is a metal and the other is a non-metal. Rules are provided for naming ionic compounds containing metals and non-metals or polyatomic ions. Key points include that polyatomic ions are charged groups that don't occur alone and ionic compounds contain positive and negative ions to be neutral overall. Formulas show how to write names and formulas for ionic compounds containing polyatomic ions.
Lesson_3_Names_and_Formulas_for_Ionic_Compounds_SLIDES.pdf
1) This document discusses the names and formulas of ionic compounds. It defines key terms like monatomic ions, polyatomic ions, and oxyanions.
2) Ionic compounds are made up of positively charged cations and negatively charged anions. Monatomic ions contain a single atom while polyatomic ions contain multiple atoms.
3) The document provides rules for writing formulas and naming ionic compounds containing polyatomic ions. The cation is written first followed by the anion and charges are balanced to give the overall formula unit a net neutral charge.
Sructure of matter edited 0611
CBSE - This ppt is made by referring the concepts of Living Science (Ratnasagar) .
For instant Assessment,after every sub -topic Recap slides are added to test students knowledge.
Chapter2
This chapter introduces fundamental concepts in chemistry including atoms, molecules, ions and chemical formulas. It discusses atomic theory and how experiments led to the discovery that atoms consist of electrons, protons and neutrons. The chapter also introduces the periodic table and explains how elements are arranged based on atomic structure and properties. It describes how atoms can form ions and molecules, and how ionic and molecular compounds are named using chemical formulas.
Chemical Reaction Analysis
This document discusses chemical concepts related to combustion analysis, oxidation states, assigning oxidation states, naming inorganic compounds, binary compounds, polyatomic ions, and oxoacids. It provides examples and rules for determining oxidation states, naming inorganic compounds based on their formulas, and identifying common polyatomic ions and their names. Key points include that combustion analysis can be used to analyze chemical substances, oxidation states are related to electrons gained or lost by atoms, and there are systematic rules for naming inorganic compounds and identifying polyatomic ions based on their structures and formulas.
Similar to Ions And Naming (20)
Grade 9 chemistry, ions and writing chemical formulae
Grade 9 chemistry, ions and writing chemical formulae
Lesson_3_Names_and_Formulas_for_Ionic_Compounds_SLIDES.pdf
Lesson_3_Names_and_Formulas_for_Ionic_Compounds_SLIDES.pdf
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Ions And Naming
- 1. Ions When atoms or molecules lose or gain electrons, they form charged particles called ions Na -> Na+ + e- O + 2e--> O2- Positively charged ions are called cations Negatively charged ions are called anions There is no change in the number of protons in the nucleus when an ion forms. Groups of atoms may carry a charge; these are the polyatomic ions OH- NH4+ NO3- CO32-
- 2. Noble Gas Connections Atoms that are close to a noble gas (group 18) form ions that contain the same number of electrons as the neighboring noble gas atom Applies to Groups 1, 2, 16 and 17, plus Al (Al3+) and N (N3-)
- 3. Names of Compounds - Cations Monatomic cations take the name from the metal from which they form Na+, sodium ion K+, potassium ion If more than one charge is possible, a Roman numeral is used to denote the charge Fe2+ iron(II) ion Fe3+ iron(III) ion
- 4. Names of Compounds - Anions Monatomic anions are named by adding –ide to the stem of the name of the element from which they form Oxygen becomes oxide, O2- Sulfur becomes sulfide, S2-
- 5. Oxoanions When a nonmetal forms two oxoanions -ate is used for the one with the larger number of oxygens -ite is used for the one with the smaller number of oxygens When a nonmetal forms more than two oxoanions, prefixes are used per (largest number of oxygens) hypo (smallest number of oxygens)
- 6. Ionic Compounds Combine the name of the cation with name of the anion Cr(NO3)3, chromium(III) nitrate SnCl2, tin(II) chloride
- 7. Binary Molecular Compounds Unlike ionic compounds, there is no simple way to deduce the formula of a binary molecular compound Systematic naming 1. The first word is the name of the first element in the formula, with a Greek prefix if necessary 2. The second word consists of The appropriate Greek prefix The stem of the name of the second element The suffix -ide
- 8. Some Examples Binary nonmetallic compounds N2O5, dinitrogen pentaoxide N2O4, dinitrogen tetraoxide NO2, nitrogen dioxide N2O3, dinitrogen trioxide NO, nitrogen oxide N2O, dinitrogen oxide Common names H2O, water H2O2, hydrogen peroxide
- 9. Acids Acids ionize to form H+ ions Hydrogen and chlorine As a molecule, HCl is hydrogen chloride When put in water, HCl is hydrochloric acid
- 10. Naming acids If anion does not contain oxygen then change ending to “ic” and add prefix hydro HF-hydrofluoric acid HCl-hydrochloric acid If anion contains oxygen “ate” becomes “ic” H2SO4-sulfuric acid “ite” becomes “ous” HNO2-nitrous acid