Question

How does following vary in a period ? Explain.

(a) Atomic Size

(b) Valence Electrons​

Answer 1

••●●The atomic size or atomic radii decreases when we move left to right in a period...

••●●The valence electrons increases by 1 (1,2,3,4)and the decreases by 1 (4,3,2,1,0)...