Ionization Energy

What is ionization energy?

• Energy required to remove an electron
• Energy needed to split an electron
• Energy required to add an electron

Ionization energy __________ as you go across a period

• stays the same

• decreases

• increases

Ionization energy __________ as you go down a group.

• stays the same

• decreases

• increases

Which element has the greater ionization energy?

• Magnesium (Mg)

• Phosphorus (P)

Which element has the greater ionization energy?

• Iodine (I)

• Chlorine (Cl)

 After the atom is ionized, it then requires more energy to remove a second electron because the second electron is nearer the nucleus.

• False
• True

Why is there a large jump in ionization energy 1 and 2 for Lithium?

• the valence electrons are harder to lose than core electrons

• the valence electrons are easier to lose than core electrons

Where is there a big jump of ionization energy increase for the element Silicon(Si)?

• between 1 and 2

• between 6 and 7

• between 7 and 8

• between 4 and 5

Element W would have how many valence electrons?

• 5

• 6

• 7

• 8

When going down a group, the size of the atom is bigger so the first IE __________.

• increases

• decreases

• constant

• I am not sure