Review Units 3 & 4

When bonds are broken,

• energy is released.
• energy is supplied
• a phase change is occurring.
• a physical change is occurring.

Activation energy is...

• the energy required to break a chemical bond
• the energy required to make a chemical bond
• all of the above
• none of the above

An ion is

• an atom with equal number of protons and electrons.
• an atom with equal number of protons and neutrons.
• an atom with unequal number of protons and neutrons.
• an atom with unequal number of protons and electrons.

Ionization energy is

• an atoms ability to hold onto core electrons
• an atoms ability to hold onto valance electrons
• an atoms ability to steal onto core electrons
• an atoms ability to steal onto valance electrons

Electronegativity is

• an atoms ability to hold onto core electrons
• an atoms ability to hold onto valance electrons
• an atoms ability to steal onto core electrons
• an atoms ability to steal onto valance electrons

In general, as you move down a group,

• atomic radius increases.
• electronegativity decreases.
• ionization energy decreases.
• all of the above.

Which of the following elements has the greatest atomic radius?

• Be
• Mg
• Ca
• Sr

Which of the following elements has the greatest atomic radius?

• Be
• B
• C
• N

Cations are,

• neutrally charged atoms.
• positively charged ions.
• negatively charged ions.
• none of the above.

Anions are,

• neutrally charged atoms.
• positively charged ions.
• negatively charged ions.
• none of the above.