Question

The atomic radii increases along a period from left to right. State if the given statement is correct or incorrect.

Answer 1

Hint: This question asks about the trend of atomic radii along the period from left to right. We will answer the question by studying the factors affecting atomic radii of elements. We will see how the size of an atom varies over a period.

Complete answer:
Atomic radius is defined as the measure of size of an atom. Basically, it is the mean distance from the center of the nucleus of an atom to the boundary of the surrounding shell.
Size of atomic radius depends upon the force of attraction exerted by nucleus of an atom on the valence electrons higher the force smaller will be the atomic radius as we move left to right along a period, we observe that more electrons are added in the valence shells of atoms, the net charge difference in atom is increased, this increases the force of attraction exerted by nucleus due to more electrons they are pulled more tightly towards the nucleus as a result atomic radius is decreased as we left to right along a period.
So, the given statement is incorrect, atomic radii decrease along a period from left to right.

Note:
The atomic radius decreases along a period from left to right but there are some exceptions such as Oxygen whose atomic radius is slightly higher than the atomic radius of Nitrogen. Atomic radius generally increases as we move down in a group, because more shells are added to the atom which increases its size as we move down in a group.