Ionic Radius and Ionization Energy

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

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

Ionization energy is...

• the energy required to add an electron to a specific atom
• how much energy it takes to remove an electron from an atom
• the energy required to shield the outer electrons from the nucleus
• a measure of the ability of an atom to attract electrons

A negatively charged subatomic particle that exists in various energy levels outside the nucleus of an atom

• neutron
• electron
• proton
• subatomic particle

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

What is a positive ion called?

• anion

• cation

• isotope

• covalent

What is a negative ion called?

• anion

• cation

• covalent

• isotope

Which types of elements from cations?

• metals

• nonmetals

• metalloids

• noble gases

Which types of elements from anions?

• metals

• nonmetals

• metalloids

• noble gases

How many electrons would a Nitrogen ion gain/lose?

• lose 5

• gain 5

• lose 3

• gain 3

How many electrons would a Calcium ion gain/lose?

• lose 1

• gain 1

• lose 2

• gain 2