Question

Which of the following is least ionic?
1.
Bel2
2.
BeCl2
3.
BeBr2
4. BeF2

Answer 1

Answer:

BeI2

Explanation:

because as we move down the group , the atomic radii increases ( because of the addition of a new shell) and hence the the ionic character of the elements decreases

Answer 2

The least ionic of all the compounds given is BeCl₂. Thus, the correct option is '2'.

Detailed Explanation:

• Those compounds with two non-metals considered as compounds with less ionic character.
• The elements having more electronegativity lead to more ionic character.
• Beryllium has smallest cation and has less electronegativity that makes it less ionic in nature.
• In BeCl₂, there are smaller number of cations that lead to formation of covalent bond and reduction in ionic bond.