1. Atoms 8. 8a Describe the structure and parts of an atoms
Atoms a Describe the structure and parts of an atoms. Verb: describe Noun: structure and parts Context: atom Describe- to give an account of in words.

2. Atoms
All Matter is made of atoms

3. Atoms Atoms are the smallest particle of an Element
Example: Smallest piece of gold is a gold atom

4. Atoms
All the atoms of an Element are almost exactly the same

5. Atoms Different Elements are made of different atoms Ex: Lithium
Helium

6. What are the parts of an atom?
Subatomic particles

7. What are the parts of an atom?
Subatomic particles
Protons
Neutrons
Electrons

8. What are the parts of an atom?
Protons
Positive (+) charge
have mass = 1amu
In the nucleus

9. What are the parts of an atom?
Neutrons – No charge (0)
have mass= 1amu
In the nucleus

10. What are the parts of an atom?
Electrons –
Negative (-) Charge
has no mass we can
measure
Electron(-) in electron
cloud

11. What are the parts of an atom?
Valence Electrons
Electrons found in the outer most regions of the atoms electron cloud
Involved in Bonding

12. Location of Subatomic Particles?

13. Location of Subatomic Particles Electron Cloud
Nucleus
Proton(+) in nucleus
Neutron(O) in nucleus
Overall charge is (+)

14. Location of Subatomic Particles
Electron(-) in electron
cloud
It surround the nucleus
It has a (-) charge

15. Location of Subatomic Particles
Our model is not accurate (correct)
The electron cloud has many
different shapes
The space between the
nucleus and electron cloud
is much greater

16. Atoms and the Periodic Table
SE: Interpret information on the periodic table to understand that physical properties are used to group element.
Verb: Interpret
Noun : information on the periodic table

17. Atoms and the Periodic Table

18. Atomic Number on the Periodic Table
Symbol Mg
Mass number

19. Atomic Number Atomic number = Protons(+)
If this number changes – New Element!

20. Electrons(-) Protons = Electrons (in a neutral atom) Atomic Number 12
Symbol Mg
Mass number

21. Neutrons (0) Must look at both number
Neutrons = Mass number – Atomic number
Must look at both number
Atomic Number
Symbol Al
Mass number

22. Atom Bonding Atoms want their outer energy level to be full
Energy Level 1 =2 electrons
Energy Level 2 = 8 electrons
Energy Level 3 = 8 electrons
How do they accomplish this?

23. Atom Bonding To fill their outer energy level they : Share
Give up all the electrons in the outer energy level
Steal electrons to complete their outer energy level

24. Atom Bonding
If they give up (lose) electrons they are no longer neutral atoms.
They are Positive Ions
Example:

25. Ex: Lithium Loses it’s valence electron and becomes a + 1 ion-
+3 -2 = +1
3P+ 4N

26. Atom Bonding If they steal electron they are no longer neutral atom.
They become a negative ion

27. Atom Bonding
Fluorine only needs one more electron to fill it’s outer energy level so it steals one and becomes negative ion
+ -10
-1 ion

28. Atom Bonding
When atoms become + or – ions, they are then attracted to oppositely charged ions and create molecule or compounds