Trends in Ionization Energy

Which has the highest ionization energy?

• Arsenic

• Iron

• ZInc

• Cobalt

Which has a lower ionization energy?

• Lithium

• Cesium

• Sodium

Ionization energy __________ as you do across a period

• has no pattern

• stays the same

• decreases

• increases

Select all that explain the ionization energy trend within periods

• electrons are closer to the nucleus

• their is a weak pull between electrons from the nucleus, making them easily moveable

• feel more of a pull from nucleus, making them harder to move

• electrons are further from the nucleus

Explain why ionization energy decreases as you go down a group.

• Outer electrons are further away from the nucleus you go down a group

• Electrons feel less pull from the nucleus as you go down a group

• Electrons are easier to remove as you go down a group

• All of the above

What is Ionization energy?

• The energy used in a chemical reaction

• Potential energy

• The energy it takes to remove one electron from an atom or ion in its gaseous state

Which of the following lists the atoms in order of increasing Ionization energy? (Look at Period 4)

• calcium, iron, copper

• copper, iron, calcium

• calcium, copper, iron

• iron, copper, calcium

Francium (Fr) has the lowest ionization energy in Group 1 because - 

• it has the smallest number of valence electrons
• it has the greatest atomic mass
• it has the greatest number of protons, so it attracts its electrons the strongest
• its 1 valence electron is very far from the nucleus, so little energy is needed to remove it

Which of the following will have a lower ionization energy than Scandium (Sc)?

• Helium (He)
• Titanium (Ti)
• Calcium (Ca)
• Magnesium (Mg)

Which of the following describe(s) the First Ionization Energy trend? (You may choose more than one answer)

• Increases Left to Right across the periodic table

• Increases Right to Left across the periodic table

• Increases Top to Bottom on the periodic table

• Increases Bottom to Top on the periodic table