Question

As you move from left to right across a period, what happens to the atomic radii?

Answer 1

Answer:

They decrease, because of the stronger effective nuclear charge.

Explanation:

• Atomic radii decreases from left to right across a period.

• This is due to the increase in the no. of protons and electrons through the period.

• One proton has a greater effect than one electron.

• So, electrons are attracted towards the nucleus and resulting in a smaller atomic radii.

Thus, the right choice is: They decrease, because of the stronger effective nuclear charge.

Answer 2

Answer:

c. They decrease, because of the stronger effective nuclear charge.

Explanation: