CHEM FINALS

What happens to ionization energy as you move across a period from left to right?

• Increases

• Decreases

• Remains the same

• Varies randomly

Why does atomic size decrease across a period?

• Increase in energy levels

• Increase in nuclear charge pulling electrons closer

• Decrease in nuclear charge

• Addition of more protons with no effect on size

What happens to electronegativity as you move down a group?

• Increases

• Decreases

• Remains constant

• Alternates between high and low

Which of the following describes metallic character as you move across a period?

• Decreases

• Increases

• Remains the same

• Varies randomly

What is the trend for atomic size as you move down a group?

• Decreases

• Increases

• Remains constant

• Increases then decreases

Which periodic trend measures the energy released when an atom gains an electron?

• Electronegativity

• Electron Affinity

• Ionization Energy

• Atomic Radius

Why does ionization energy decrease down a group?

• Electrons are farther from the nucleus and experience less attraction.

• Atomic number decreases.

• Electrons are tightly bound to the nucleus.

• Protons lose their charge.

Which element would have the largest atomic radius in Group 1A?

• Cesium (Cs)

• Sodium (Na)

• Lithium (Li)

• Potassium (K)

Why do noble gases have high ionization energies?

• They have a full valence shell and are very stable.

• They are highly reactive.

• They have small atomic sizes.

• They have low electronegativity.

Which group has the highest electronegativity values?

• Noble gases

• Alkali metals

• Halogens

• Alkaline earth metals