Question

The general formula of the compound formed when a metal (M) of group — 1 reacts with non-metal (x) of group — 16 is:

• A. MX6
• B. M2X3
• C. MX2
• D. M2X

Hint:

To find formulas of ionic compounds, use the valency of metal and non-metal and apply the crisscross method.

Answer 1

The Correct Option is D

Step 1: Identify valencies.
Group 1 metal M has valency 1; Group 16 non-metal X has valency 2.

Step 2: Cross-multiply to get the formula.
Two M\(^+\) ions are needed to balance one X\(^{2-}\). Formula = M\(_2\)X.
\[ \boxed{M_2X} \]