Answer:
I'd Go. B. weigh everything, let the reaction happen, then weigh everything again.
Answer:
2n² is a formula that determines that the maximum number of electrons should be accommodated in a particular shell.
Explanation:
A) Magnesium Chloride
Mg is the symbol of Magnesium and Cl is the symbol of chlorine ( but when Cl is a compound it will be Choride)
potassium belongs to group IA of the periodic table.