Question

I am the Modern Periodic Table, where elements are arranged on the basis of ……………. I

have horizontal rows called ……………. and ……………. vertical columns are called

……………. My first period is very short with ……………. elements and second and third

periods contain ……………. elements, fourth and fifth ……………. has …………….

elements. Sixth period has ……………. elements but seventh period is ……………. with

space for more elements. 17 group is of ……………., 18 is of ……………. Atomic size of

the elements ……………. across the period but ……………. down the group. Metallic

character ……………. across the period but non-metallic character ……………. Number of

valence electrons ……………. across the period and the valency ……………. but valency of

the elements is ……………. in a group. All the properties of elements are the Periodic

function of their ……………​

Answer 1

Answer:

1.Atomic Number

2.periods and groups