Transcript Slide 1

Notes
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SPI 0807.9.1
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THROUGHAtoms
THE PRESENTATION

Atoms (Part 1):
 All matter is made up of atoms
 Matter is anything that is a solid, liquid, or gas
 The different types of atoms are called elements
 We once thought atoms were the smallest particles, but we
now know there are even smaller particles (sub-atomic particles)
 Atoms are made of 3 sub-atomic particles…
…protons (are the blue circles)
…neutrons (are the green circles)
…electrons (are the orange circles)
Here is a model of
one atom
Notes
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
SPI 0807.9.1 (Atoms)
Below is a model of one beryllium atom
Notice that is has 4 (blue) protons
So the atomic number is four
Notice that it also has 4 (orange) electrons
1
3
2
Legend
2
1
4
=protons
=neutrons
=electrons
4
3
HINT: Look at the top/right of p286 to see how to read the
SPI 0807.9.1 (Atoms)
Notestable.
periodic
SPI 0807.9.9 (Per Table)
HINT: The atomic number
is the number of protons!

A) What is this element’s atomic number
Write it down!
ANSWER: Atomic number is 3 because it has 3 (blue) protons
3
Li
Lithium
6.9

HINT:Notes
Look at the top/right
p286 to(Atoms)
see how to read the per table
SPIof
0807.9.1
SPI 0807.9.9 (Per Table)
A) What is this element’s chemical symbol
Write it down!
ANSWER: Chemical symbol is Li
3
Li
Lithium
6.9

HINT:Notes
Look at the top/right
p286 to(Atoms)
see how to read the per table
SPIof0807.9.1
SPI 0807.9.9 (Per Table)
A) What is this element’s name?
Write it down!
ANSWER: Element name is lithium
3
Li
Lithium
6.9

SPIof0807.9.1
HINT:Notes
Look at the top/right
p286 to(Atoms)
see how to read the per table
SPI 0807.9.9 (Per Table)
A) What is this element’s atomic mass.
Write it down!
ANSWER: Atomic mass is 6.9
3
Li
Lithium
6.9