Question 1
The element magnesium (Mg) comprises three isotopes with mass numbers 24 (atomic mass 23.99 amu), 25 (atomic mass 24.99 amu) and 26 (atomic mass 25.98 amu), with the natural abundance of 78.99%, 10.00% and 11.01%, respectively. Calculate the atomic mass of Mg.
Question 2
Complete the following table.
Emission | Symbol | Charge |
| He | |
beta | | -1 |
| γ | |
| e | |
neutron | | 0 |