Question

1. what is the name for an atoms ability to strongly pull an electron toward itself when making a bond?

ionization energy
nuclear charge
atomic radius
electronegativity

1. as you look across a row of the periodic table, what happens to the number of electron shells (the distance from the nucleus to the bond) in the atoms?

it decreases
it increases
it stays the same
it first decreases, then increases

Explanation:

Question 1

• Ionization Energy: Energy to remove an electron, not pull. Eliminate.
• Nuclear Charge: Positive charge of nucleus, not about pulling electrons in bonding. Eliminate.
• Atomic Radius: Size of atom, not electron - pulling ability. Eliminate.
• Electronegativity: Defined as an atom's ability to attract electrons in a chemical bond. This matches the description.

• When moving across a period (row) in the periodic table, atoms have the same number of electron shells. For example, in the second period (Li to Ne), all atoms have 2 electron shells. The number of protons and electrons increases, but the shell number (energy level) remains constant across a row. So the number of electron shells stays the same.

Answer:

D. Electronegativity

Question 2