Question

Question 2
Element X forms a chloride with the formula ${\text{XCl}}_2$, which is a solid with a high melting point. X would most likely be in the same group of the periodic table as:
1. Na
2. Mg
3. Al
4. Si

Answer 1

Mg forms a chloride with the formula ${\text{MgCl}}_2$ as it has two valence electrons. It has high melting and boiling point. Elements with similar properties are placed in the same group. So, the element X will be placed in the same group as magnesium.