Matter
&
the Atom
QuickTime™ and a
TIFF (Uncompressed) decompressor
are needed to see this picture.
Matter
The term matter

describes all of the
around us.:

physical substances
Your table,

QuickTime™ and a
TIFF (Uncompre...
Matter includes things that can be
seen,
tasted,
smelled,

TIFF (U QuickTime™
nco
and
are need mpressed) decom a
ed to see...
QuickTime™ and a
TIFF (Uncompressed) decompressor
are needed to see this picture.

What is matter made of?
Models are for things that are too small or too large.

Models explain data or facts. So, they are theories.
Modern Model of the Atom
The Electron Cloud
Is sometimes called the
wave model.
Has a spherical cloud of
varying density.
...
What do we now think atoms are made of?
Protons:
•Are much larger and heavier than electrons.
•Have a positive charge (+)....
An Atom is a Basic Building Block,
so it’s an Element!
Each element has a different number
of protons.
The number of proto...
•Every _______
has its own
atomic number.
QuickT
TIFF (
Un
im
are neecompressed e™ and a
)d
ded to
see thisecompresso
r
pi...
So what’s with atomic mass?
Imagine trying to measure
the mass of something so small
that you cannot see it!
Scientists us...
How are atomic mass and atomic
number different? Does it matter?
The atomic number can be found above
the element’s name o...
If Element = Different Atomic Mass than says on
Periodic Table, it’s Called Isotope
The atomic number of an element
never ...
Isotope :

An Element that Has a Different Atomic Mass
than What Appears on the Periodic Chart.
It Even Has a Different Na...
If an isotope has a different atomic masses,
and you know its atomic number,
what can you figure out ?
TIF
F
are (Unco Qui...
Carbon-14 dating, or radiocarbon
dating, uses the amount of carbon-14
in a substance to calculate its age.

QuickTime™ and...
Ions are

Atoms Seeking Balance

An atom that carries an electrical
charge is called an ion.
If the atom loses electrons, ...
Ions Seek Partners

Helium Atom

Hint:
All electrons have a negative
charge.
charge

How is this ion positive?

How is thi...
QuickTime™ and a
TIFF (Uncompressed) decompressor
are needed to see this picture.
How much do you know about
atoms?
Atoms

Electrons

Atomic Number
Elements

Protons

Neutrons

Atomic Mass
Isotopes
Ions
A T O M
A T O M
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A T O M

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MODELS, COMPONENTS, TYPES

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A T O M

  1. 1. Matter & the Atom QuickTime™ and a TIFF (Uncompressed) decompressor are needed to see this picture.
  2. 2. Matter The term matter describes all of the around us.: physical substances Your table, QuickTime™ and a TIFF (Uncompressed) decompressor are needed to see this picture. your body, a pencil, water, THE UNIVERSE. Matter has mass and takes up space (volume). It is made up of different kinds of atoms.
  3. 3. Matter includes things that can be seen, tasted, smelled, TIFF (U QuickTime™ nco and are need mpressed) decom a ed to see this pictupressor re. or touched. Matter does not include heat, sound, or light.
  4. 4. QuickTime™ and a TIFF (Uncompressed) decompressor are needed to see this picture. What is matter made of?
  5. 5. Models are for things that are too small or too large. Models explain data or facts. So, they are theories.
  6. 6. Modern Model of the Atom The Electron Cloud Is sometimes called the wave model. Has a spherical cloud of varying density. Varying density shows where an electron is more or less likely to be.
  7. 7. What do we now think atoms are made of? Protons: •Are much larger and heavier than electrons. •Have a positive charge (+). •Are located in the nucleus. Electrons: •Are tiny, light electrical particles that are negative (-). •Move around the outside of the nucleus. Neutrons: Are large and heavy like protons. Have no electrical charge. Are located in the nucleus of the atom.
  8. 8. An Atom is a Basic Building Block, so it’s an Element! Each element has a different number of protons. The number of protons is also called proton the atomic number. So, QuickTime™ and a TIFF (Uncompressed) decompressor are needed to see this picture. QuickTime™ and a TIFF (Uncompressed) decompressor are needed to see this picture. atomic # = # of protons The atomic #= Fingerprint
  9. 9. •Every _______ has its own atomic number. QuickT TIFF ( Un im are neecompressed e™ and a )d ded to see thisecompresso r picture .
  10. 10. So what’s with atomic mass? Imagine trying to measure the mass of something so small that you cannot see it! Scientists use the amu, or atomic mass unit, to measure mass. TIF F are (Unc Quic n e e o mp k T ded res ime to s sed) ™ a ee dec nd a this om pic pre tur sso e. r One amu = the mass of one proton and neutron, but the electron is so small, it is 1/1,836 amu! So, cut out the electron in the calculation: the mass of protons + neutrons = atomic mass.
  11. 11. How are atomic mass and atomic number different? Does it matter? The atomic number can be found above the element’s name on the periodic table. It is the number of protons. and The atomic mass is both the TIFFQuickTime™ this (Uncompressed) are needed to see protons and the neutrons together. Round it.. Atomic mass - Atomic number = the # of neutrons. If you know one of the three numbers, can you figure out the others?
  12. 12. If Element = Different Atomic Mass than says on Periodic Table, it’s Called Isotope The atomic number of an element never changes. This is its fingerprint. But, atoms of the same element may not all have the same number all have the same number of neutrons. This means that these atoms may have a different atomic mass.
  13. 13. Isotope : An Element that Has a Different Atomic Mass than What Appears on the Periodic Chart. It Even Has a Different Name. Isotopes = Element Variations
  14. 14. If an isotope has a different atomic masses, and you know its atomic number, what can you figure out ? TIF F are (Unco Quic nee mp kTi ded res me™ to s sed) ee dec and a this om pic pres tur sor e. If a nucleus has too many or too few neutrons, it becomes unstable. It releases radiation and decays. This means the electrons can be broken down and released. Mass # - Atomic # = # of Neutrons
  15. 15. Carbon-14 dating, or radiocarbon dating, uses the amount of carbon-14 in a substance to calculate its age. QuickTime™ and a TIFF (Uncompressed) decompressor are needed to see this picture.
  16. 16. Ions are Atoms Seeking Balance An atom that carries an electrical charge is called an ion. If the atom loses electrons, the atom becomes positively charged (more protons = + charge). What if it gains electrons? (more electrons = - charge)
  17. 17. Ions Seek Partners Helium Atom Hint: All electrons have a negative charge. charge How is this ion positive? How is this ion negative?
  18. 18. QuickTime™ and a TIFF (Uncompressed) decompressor are needed to see this picture.
  19. 19. How much do you know about atoms? Atoms Electrons Atomic Number Elements Protons Neutrons Atomic Mass Isotopes Ions
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