Question

which of the following best explains why atomic radius decreases left to right across a period? a protons are added to the nucleus, and the force of attraction on electrons is stronger b electrons are being removed from the atom, so the number of orbitals is decreasing c protons are added to the nucleus, and the force of attraction on electrons is weaker d electrons are added, and they are attracted to other electrons e electrons are added, and they are repelled by the protons

Explanation:

As you move from left - to - right across a period, the number of protons in the nucleus increases. This leads to a greater nuclear charge, which in turn increases the electrostatic attraction between the nucleus and the electrons. As a result, the electrons are pulled closer to the nucleus, causing the atomic radius to decrease.

Answer:

A. Protons are added to the nucleus, and the force of attraction on electrons is stronger