Question

1. which of the following explains why atomic radius decreases across a period? a) more shielding electrons are added b) electrons are lost c) nuclear charge increases, pulling electrons closer d) neutrons are removed 10. the largest atoms are usually found: a) top right of the periodic table b) bottom left of the periodic table c) top left of the periodic table d) bottom right of the periodic table

Explanation:

For question 9, as you move across a period, the number of protons (nuclear charge) increases while electrons are added to the same energy - level. The increased nuclear charge pulls the electrons closer, decreasing the atomic radius. For question 10, atomic radius increases down a group (due to addition of energy levels) and decreases across a period. So the largest atoms are found at the bottom - left of the periodic table.

Answer:

1. c) Nuclear charge increases, pulling electrons closer
2. b) Bottom left of the periodic table