Ionization Energy Quiz

What is the general trend of ionization energy across a period in the periodic table?

• It remains constant.

• It decreases from left to right.

• It increases from left to right.

• It fluctuates randomly.

Why is the first ionization energy of helium higher than that of francium?

• Francium has a higher effective nuclear charge.

• Francium's electrons are more tightly bound.

• Helium has a larger atomic radius.

• Helium's electrons are closer to the nucleus.

What happens to the size of an atom when it loses an electron and becomes a cation?

• It becomes smaller.

• It remains the same.

• It fluctuates in size.

• It becomes larger.

Why does the ionization energy increase significantly when removing a core electron?

• Core electrons have less energy.

• Core electrons are more loosely bound.

• Core electrons are further from the nucleus.

• Core electrons are closer to the nucleus.

Which element would have a higher second ionization energy, sodium or magnesium?

• Neither has a second ionization energy

• Both have the same

• Sodium

• Magnesium

Why is beryllium's first ionization energy higher than boron's?

• Beryllium has a filled subshell.

• Boron has a half-filled subshell.

• Beryllium has a half-filled subshell.

• Boron has a filled subshell.

What is the reason for nitrogen having a higher ionization energy than oxygen?

• Nitrogen has a filled subshell.

• Oxygen has a half-filled subshell.

• Nitrogen has a half-filled subshell.

• Oxygen has a filled subshell.

Which element is more stable due to its electronic configuration, nitrogen or oxygen?

• Neither is stable

• Both are equally stable

• Oxygen

• Nitrogen

What is a common feature of elements with high ionization energies?

• They have low effective nuclear charges.

• They have large atomic radii.

• Their electrons are close to the nucleus.

• They have many valence electrons.

Why is it important to understand the exceptions in ionization energy trends?

• They help predict chemical behavior.

• They are irrelevant to chemical reactions.

• They do not affect periodic trends.

• They are only theoretical concepts.