A) Elements in the Periodic table show periodicity in properties . Lis

1.	A) Elements in the Periodic table show periodicity in properties . List any four such properties b) Give reasons for the following :i) No fixed position is assigned to hydrogen in the periodic table .ii)Lithium atom is smaller than sodium atom.iii) Chlorine (atomic Number : 17) is more electronegative than sulphur (Atomic Number : 16)
Answer» ong>Answer: a) periodic PROPERTIES are: atomic radii ionisation potential electron affinity Electronegativity. Explanation: b) i) because it resembles alkali metals by forming positive IONS and resembles halogens by forming diatomic molecule. ii) Li has 2 shells and Na has 3 shells. So Li is smaller than Na. iii) CHLORINE has greater attraction for electrons than SULPHUR. It is more electronegative than sulphur.

A) Elements in the Periodic table show periodicity in properties . List any four such properties b) Give reasons for the following :i) No fixed position is assigned to hydrogen in the periodic table .ii)Lithium atom is smaller than sodium atom.iii) Chlorine (atomic Number : 17) is more electronegative than sulphur (Atomic Number : 16)

Answer»

ong>Answer:

a) periodic PROPERTIES are:

atomic radii

ionisation potential

electron affinity

Electronegativity.

Explanation:

b) i) because it resembles alkali metals by forming positive IONS and resembles halogens by forming diatomic molecule.

ii) Li has 2 shells and Na has 3 shells. So Li is smaller than Na.

iii) CHLORINE has greater attraction for electrons than SULPHUR. It is more electronegative than sulphur.