Teaching Bihar STET Paper 1 (माध्यमिक) Mock Test 2024 General Science Chemistry Chemical Bond and Molecular Structure
The atomic number of magnesium is 12 and mass number is 24. Which one of the following is the correct representation of the ion formed from it and its valency?
1
Mg2+ ; valency = 2
2
Mg2+ ; valency = 6
3
Mg3+ ; valency = 5
4
Mg3+ ; valency = 3