Atom/ Ion Chart Homework Sheet
Name: ______________________________
1. Fill in the chart with the missing information
Element
symbol
Atomic
number
Mass
number
Protons
B
Neutrons
6
11
24
35
43
+4
Mo
0
0
206
0
45
15
16
-1
18
33
-2
52
2. How many protons, neutrons, and electrons are in:
Uranium–235
70
53
Br
Cesium–133
+2
207
81
0
43
102
Aluminum–28
+3
39
29
Pb
0
37
89
100
Charge
10
31
S
Electrons
77
54
3. Given the following numbers of particles, write the atomic symbol, including atomic number, mass
number, and charge (if applicable)
14 protons, 29 neutrons, 14 electrons
56 protons, 80 neutrons, 54 electrons
53 protons, 74 neutrons, 54 electrons