Question

Explain the following trend in the modern periodic table.

(a) Valency across a period.

(b) Atomic size down a group

(c) Metallic character across a period.
​

Answer 1

a) In a period , the number of valence electrons increases as we move from left to right side . However , in a group this periodic trend is constant ... the number of valence electrons remains the same .

b) The atomic radius of an element is a measure of the size of its atoms .

• It represents the mean distance from the nucleus to the outermost boundary of the surrounding cloud of electrons .

• Atomic radii vary in a predictable manner across the periodic table .

c) In modern periodic table metallic character increases down the group and decreases from left to right across the period .

Hope it helps ya ❤️

Answer 2

Answer:

Option C

pls mark as brainliest

I hope it will help you