2 goes into 12 6 times and into 14 7 times
Two go's into both numbers. As 2x6=12 and 2x7=14.
What blank?
30
14
14
The mass number is the number of protons plus neutrons. Magnesium is element number 12, so it has 12 protons. Its mass number with 14 neutrons is 12 + 14 which is 26.
1, 2, 7, 14
1, 2, 7, 14.
1, 2, 7, 14.
2 and 7
7
2
1