1. Atoms can lose or gain electrons to become Ions!
STOP
Atoms can lose or gain electrons to become Ions!
Ion
I’ve got my you!

2. ION Cation Anion Ion: atom with a plus or a minus charge.
Atom with a different number of protons and electrons.
two types
Cation
Cation: an atom with a positive charge.
Atom with more protons (+) than electrons (-)
Cats have paws….Cations are pawsitive…
Anion
Anion: an atom with a negative charge.
Atom with more electrons (-) than protons (+)
A negative ion, looks like onion (make you cry… is negative)

3. O 8 8 8 +8 -8 Protons:_______ Neutrons:______ Electrons:_____ +1 +1 +1
Oxygen 16 8 8 8
Neutral Oxygen Atom +1 +1 +1 +1 +1 +1 +1 +8 +1 -8 -1 -1 -1 -1 -1 -1 -1 -1

4. O 8 8 9 O1- O- +8 -9 Protons:_______ Neutrons:______ Electrons:_____
Oxygen 16 8 8 9
O1- O-
Charge on this Atom? or +1 +1 +1 +1 +1 +1 +1 +8 +1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -9

5. O 8 8 10 O2- +8 -10 Protons:_______ Neutrons:______ Electrons:_____ +1
Oxygen 16 8 8 10
O2-
Charge on this Atom? +1 +1 +1 +1 +1 +1 +1 +8 +1
-10 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1

6. Li 3 4 3 2 +3 Li+ Li+1 -2 -3 Protons:_______ Neutrons:______
Electrons:_____ 3 Li
Lithium 7 3 4 3 2
If Lithium loses an electron?
Neutral Lithium Atom? +1 +1 +1 +3
Li+ or -1 -1 -1 -2 -3
Li+1

7. All of these atoms have something in common except for one of them
All of these atoms have something in common except for one of them. Pick the Odd Man Out and explain why. Ne
Na+
O2-
F1-
N3- Mg
Odd Atom Out?
Justification?

8. An atom that has lost an electron. An atom that gained an electron.
Cation
Anion or
Put these in the appropriate Column
O2-
Li+
An atom that has lost an electron.
An atom that gained an electron.
Write a mathematical expression for determining the charge on an atom.

9. #p - #e = charge Protons 9 Electrons 10 Charge Symbol Protons 7
Number of protons minus the number of electrons equals the charge on an atom.
#p - #e = charge
Protons 9
Electrons 10
Charge
Symbol
Protons 7
Electrons 10
Charge
Symbol
Protons 11
Electrons 10
Charge
Symbol
Protons 13
Electrons 10
Charge
Symbol
Protons 19
Electrons
Charge 1+
Symbol
Protons 20
Electrons
Charge 2+
Symbol
Protons
Electrons 18
Charge 2-
Symbol
Protons
Electrons 18
Charge 1-
Symbol
Protons
Electrons
Charge
Symbol
Ba2+
Protons
Electrons
Charge
Symbol
Cs1+
Protons
Electrons
Charge
Symbol
Br1-
Protons
Electrons
Charge
Symbol
P3-