1. Intro to
Chemistry

2. Atom Molecule WRITE Element Compound
The smallest part of an element which still have the chemical properties of that element.
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Molecule
The smallest physical unit of an element or compound, made of one or more identical atoms (in an element) or two or more different atoms (in a compound).
Element
A substances that cannot be separated into simpler substances by chemical means .
Compound
A pure substance composed of two or more elements whose composition is constant.

3. ELEMENTS are the basic building blocks from which everything is made.
They are pure substances, and not made of other things that have been combined.
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4. The ancient Greeks believed there were only 4 elements
WRITE A IR
Everything in the world is made up of 4 Elements. F
IRE
They were wrong. E
ARTH W
ATER

5. Remember, people believed that everything in the world was made up of 4 basic elements.
FIRE
WATER
EARTH
AIR

6. Let’s look at a tree. The tree is made of earth, air and water
Let’s look at a tree. The tree is made of earth, air and water. Fire will destroy it.
Everything in the world was made of these 4 elements combined in different amounts.
WATER
AIR
EARTH
FIRE

7. A F E W A FEW Elements WRITE AIR EARTH FIRE WATER
An easy way to remember the original ELEMENTS is that were only A FEW elements.
A FEW Elements
WRITE
FIRE
WATER
EARTH
AIR A F E W

8. Today we know there are about 114 elements, and the same rules apply…
They are pure substances, not made of other things that have been combined.

9. What does an Atom look like ?
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10. What does an Atom look like ?
DRAW - - + + - - - + + +

11. What does an Atom look like ?
DRAW

12. What does an Atom look like ?
DRAW

13. What does an Atom look like ?
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DRAW
We call this an Electron Cloud

14. _ + WRITE Electrical Name of Charge Particle Location Size Nucleus
Proton
Nucleus
1 A.M.U.
Neutron
Nucleus
1 A.M.U.
Neutral _
So small we
can call it
Somewhere
outside the
Nucleus
Electron
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15. The number of Protons + Neutrons

16. Let’s look at the Periodic Table
When looking at an Element on the Periodic Table, we can get a lot of information. 13 Al
Aluminum 17
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DRAW

17. Let’s look at the Periodic Table
When looking at an Element on the Periodic Table, we can get a lot of information. 13
Atomic Symbol
Can be 1, 2 or 3 letters. The first letter must always be a capital, and the rest must always be lower case. Al
Name of
Element
Aluminum 17
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18. Al 13 17 Let’s look at the Periodic Table Aluminum WRITE
When looking at an Element on the Periodic Table, we can get a lot of information. 13
Atomic Weight
This represents the number of protons PLUS the number of neutrons in the nucleus of this atom. Al
Atomic Number
This represents the number of protons in the nucleus of this atom.
Aluminum 17
WRITE

19. Let’s look at the Periodic Table
When looking at an Element on the Periodic Table, we can get a lot of information. 13 Al
This icon tells whether the Element is a solid, a liquid or a gas at room temperature. Some periodic tables don’t have this.
Aluminum 17
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20. There is 1 electron for every proton.
Important Rule #1
There is 1 electron for every proton.
Remember, the electrons are so small we don’t bother to count their weight, but they are important when it comes to charge.
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21. To figure out how many Neutrons are in an atom…
Important Rule #2
To figure out how many Neutrons are in an atom…
Atomic Weight
Atomic Number
Number of Neutrons
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22. Try These

23. He 2 4 Helium What is the atomic symbol for this element ?
What is the name of this element ?
What is the atomic weight of this element ?
How many protons are in 1 atom of this element ?
How many neutrons are in 1 atom of this element ?
How many electrons are in 1 atom of this element ?
What state of matter is this element in at room temperature ? 2 He
Helium 4

24. Au 79 197 Gold What is the atomic symbol for this element ?
What is the name of this element ?
What is the atomic weight of this element ?
How many protons are in 1 atom of this element ?
How many neutrons are in 1 atom of this element ?
How many electrons are in 1 atom of this element ?
What state of matter is this element in at room temperature ? 79 Au
Gold
197

25. W 74 184 Tungsten What is the atomic symbol for this element ?
What is the name of this element ?
What is the atomic weight of this element ?
How many protons are in 1 atom of this element ?
How many neutrons are in 1 atom of this element ?
How many electrons are in 1 atom of this element ?
What state of matter is this element in at room temperature ? 74 W
Tungsten
184

26. Hg 80 201 Mercury What is the atomic symbol for this element ?
What is the name of this element ?
What is the atomic weight of this element ?
How many protons are in 1 atom of this element ?
How many neutrons are in 1 atom of this element ?
How many electrons are in 1 atom of this element ?
What state of matter is this element in at room temperature ? 80 Hg
Mercury
201

27. Kr 36 84 Krypton What is the atomic symbol for this element ?
What is the name of this element ?
What is the atomic weight of this element ?
How many protons are in 1 atom of this element ?
How many neutrons are in 1 atom of this element ?
How many electrons are in 1 atom of this element ?
What state of matter is this element in at room temperature ? 36 Kr
Krypton 84

28. Here's A
Puzzle

29. Scandium Hydrogen Oxygen Oxygen Lithium Sulfur Fluorine
Uranium Nitrogen

30. ScHOOLiSFUN