Explain why size of cation is smaller than of the parent atom.

Explain why size of anion is larger than parent atom.

Define the term ionic radius. Justify that the radius of anion is larger than the parent atom.

Explain why sliding friction is less than static friction.

Explain why ethylamine is stronger than ammonia ?

Assertion (A) : In sodium chloride crystal, the coordination number of Na^(o+) IS 6 . Reason (R ) : The sodium atom is smaller than chlorine atom.

(i) An element has electronic configuration 2, 8, 6. Explain its position in the periodic table. (ii) Size of sodium atom is bigger than that of hydrogen atom. Why?

Give reasons for the following: a] Metals have a tendency to form cations. b] Fluorine atom is smaller than chlorine atom. c] Non-metals have a tendency to gain electrons.

Explain why aniline is less basic than methylamine ?

Explain why A has lower boiling point than B ?

Explain why there is no waste in a forest