Answer:
35.45253819
Explanation:
(0.7578*34.96....)+(0.2422*36.96...)
It is 25%. 25g ÷ 100g × 100% = 25%
1 - 8
2 - 13
3 - 20
4 - 19
5 - 19
6 - 22
* protons - Atomic number
electrons - number of electrons is equal to number of protons k-41 is neutral
neutrons - Mass number - Atomic number
= 41 -19
= 22