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Atoms to Ions
The Atom
Let’s look at Sodium
Na
2 8 1
Number of Electrons
11
11+
11-
Over all charge
0 neutral
Atomic Number
Number of Protons
The Atom
Let’s look at Sodium
Na
2 8 1
Number of Electrons
11
11+
11-
Over all charge
0 neutral
Atomic Number
Number of Protons
The Atom
Let’s look at Sodium
Na
1
2 8 1
Oohh
Sodium
doesn’t like that.
It wants a “happy” shell
The Atom
Let’s look at Sodium
It could
gain 7
Na
Na
2 8 1
2 8 8
or drop
1
Na
Na
2 8 1
2 8
Dropping 1 is easier
sooooo
The Atom
ION
Let’s look at Sodium
Na
Na
2 8
2 8 1
Atomic Number
Number of Protons
Number of Electrons
Over all charge
11
11+
11
10-neutral
10positive
The Atom
The ION
Let’s look at Sodium
Na
NEUTRAL
atom
Na
ION
1+
The Atom
Let’s look at Oxygen
O
2 6
Atomic Number
Number of Protons
Number of Electrons
Over all charge
8
8+
80 neutral
The Atom
Let’s look at Oxygen
O
6
2 6
Oohh
Oxygen
doesn’t like that
The Atom
Let’s look at Oxygen
It could
gain 2
O
O
2 6
2 8
or drop
6
O
O
2 6
2
Gaining 2 is easier
sooooo
The Atom
ION
Let’s look at Oxygen
OO
2 26 8
8
Number of Protons
8+
Number of Electrons 10
8-Over all charge
20negative
neutral
Atomic Number
The Atom
The ION
Let’s look at Oxygen
O
NEUTRAL
atom
O
2-
ION
The ION
To make life a bit easier
remember these questions
1. Is it a metal or a non metal?
2. Is it a plus or a minus?
3. Valance Number ? You DO remember valance numbers??
The ION
Let’s try Aluminium
1.
Is
itit a
metal
ora aminus?
non metal?
2.
Is
a
plus
or
3. Valance Number ?
METAL
PLUS
3
Al
3+
The ION
Let’s try Sulphur
1.
Is
itit a
metal
ora aminus?
non metal?
2.
Is
a
plus
or
3. Valance Number ?
NON-METAL
MINUS
2
S
2-
Lots of Happy Ions
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