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Date_________
Hour_________
The following atoms are ions. Do you remember what an ion is? Think about the Bohr Models that
we drew in class. Remember what they looked like when they were neutral? How did they look
different when the element ionized?
Fe3+
Fe3-
Element
The plus 3 is telling you how many electrons are gained or lost during
ionization. This example is saying that iron has lost three electrons.
Remember protons never leave the atom. If they do then you change the
type of element!!!!!
The minus 3 is telling you how many electrons are gained or lost during
ionization. This example is saying that iron has gained three electrons.
Remember protons never leave the atom. If they do then you change the
type of element!!!!!
Atomic
Number
Hydrogen
Chlorine
Proton
Number
1
17
Iron
15
Neutron
Number
5
19
Mass
Number
1
Ion Symbol
56
Fe4+
7
14
20
K3-
Neon
10
12
20
Cesium
55
54
133
Beryllium
Titanium
5
22
Silicon
14
Copper
29
Arsenic
33
9
Be3+
48
Ti2-
14
28
H2-
18
26
Nitrogen
Potassium
Electron
Number
Si4-
35
34
75
Bromine
35
30
45
Tungsten
74
70
110