WorksheetsCalculating Mass Number
Total questions: 10
Worksheet time: 5mins
The Helium (He) atom in Group 18 has 2 protons and the mass number is 4. How many neutrons are in the Helium (He) atom?
1
2
3
4
The Boron (B) atom in Group 13 has 5 protons and the mass number is 11. How many neutrons are in the Boron (B) atom?
5
6
7
8
The Chromium (Cr) atom in Group 6 has 24 protons and the mass number is 52. How many neutrons are in the Chromium (Cr) atom?
26
27
28
29
The mass number of the Calcium (Ca) atom in Group 2 is 40 and the number of protons is 20. How many neutrons are in the Calcium (Ca) atom?
20
30
40
50
The mass number of the Potassium (K) atom in Group 1 is 39 and the number of protons is 19. How many neutrons are in the Potassium (K) atom?
10
20
30
40
The Magnesium (Mg) atom in Group 2 has 12 protons and 12 neutrons. What is the mass number of Magnesium (Mg) atom?
24
25
26
27
The Oxygen (O) atom in Group 16 has 8 protons and 8 neutrons. What is the mass number of Magnesium (Mg) atom?
14
15
16
17
The Aluminum (Al) atom in Group 13 has 13 protons and 13 neutrons. What is the mass number of Aluminum (Al) atom?
25
26
27
28
The Iron (Fe) atom in Group 8 has 26 protons and 30 neutrons. What is the mass number of Iron (Fe) atom?
26
36
46
56
The Fluorine (F) atom in Group 17 has 9 protons and 10 neutrons. What is the mass number of Magnesium (Mg) atom?
19
20
21
22
