Question

be²⁺ and nitrite anion (no₂⁻).

Explanation:

Step1: Determine the charges

Beryllium ion has a charge of \(+2\) (\( \text{Be}^{2+} \)) and nitrite anion has a charge of \(-1\) (\( \text{NO}_2^- \)).

Step2: Balance the charges

To form a neutral compound, we need 2 nitrite anions to balance the \(+2\) charge of one beryllium ion. The formula is determined by the criss - cross method, where the magnitude of the charge of one ion becomes the subscript of the other ion. So the formula is \( \text{Be(NO}_2\text{)}_2 \).

Answer:

The chemical formula of the compound formed by \( \text{Be}^{2+} \) and \( \text{NO}_2^- \) is \( \boldsymbol{\text{Be(NO}_2\text{)}_2} \)