Question

On moving from left to right in a period of the periodic table, the atomic number of elements increases. What happens to the size of atoms of elements on moving from left to right in a period?
(a) increases
(b) decreases
(c) remain the same
(d) first increases then decreases

Answer 1

Answer:

(b) Decreases

Explanation:

This happens  because on moving from left to right in along a period, the number of electrons and protons also increases. The increase in their number increases the effective nuclear charge. Due to this the attractive force between them increases which leads to electrons moving more closer to the nucleus.

This causes a decrease in size of the atom.

However, the size of noble gases at the end of a period is maximum because while  considering there atomic size/radius

van der walls'

radius is taken.

Answer 2

Answer:

it decreases

Explanation: Hey mate,here you go....

It decreases

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