Question

Atoms of which pair of elements will form ionic bonds in a compound

A. I and F
B. Ag and Ca
C. Be and Cl
D. Na and Al ​

Answer 1

Answer:

D. Na and Al

one of the two elements will transfer it's extra electron to the other needy element in order to complete it's octet.

Answer 2

The pair of elements which will form ionic bonds in a compound is B) Ag and Ca.

• The covalent character can b determined by Fajan's rule.
• It states that the larger the size of the anion and the smaller the size of the cation larger the covalent character and the smaller will be the anionic character.
• It also includes the oxidation state, as the higher the oxidation state higher the covalent character will be.
• Iodine has the largest size so it has the most covalent character.
• Similarly, Na and Al have large sizes so, they have the most covalent character.
• Beryllium is a small cation and has the most covalent character.
• Ag and calcium have the most ionic character due to their large size they have small covalent character as per Fajan's rule.