Question

Explain how does the properties change in period in a periodic table? ​

Answer 1

Along the period-

i) The number of valence electrons increase.

ii) Elements elements become less metallic.

iii) Atomic size decreases.

iv) Electronegativity increases

v) First first valency increases up to 4 then decreases.

vi) Boiling point and melting point increase.

Down the group-

i) The number of shells increase.

ii) Elements become more metallic.

iii) Atomic size increases.

iv) Electronegativity decreases.

v) Valency is same.

vi) boiling and melting point decrease.