Review For Unit 1 District Assessment

What state of matter has the least amount of kinetic energy?

• Solid

• Liquid

• Gas

• Plasma

Which state of matter has molecules that are densely packed?

• solid

• liquid

• gas

• plasma

Why do atoms transfer their valence electrons?

• So they can become radioactive

• So they can become more stable

• So they can become less stable

• So they can become a metal

What are the Valence electrons?

• the total number of electrons an atom has

• the stable electrons

• the radioactive electrons

• the outer most electrons

The heat of fusion is...

• the amount of energy required to change a substance from liquid to gas

• the temperature at which a substance melts

• the amount of energy required to change a substance from solid to liquid

• the temperature at which a substance boils

What is the oxidation number for group 1 on the periodic table?

• -1

• +1

• -2

• +2

What is the oxidation number for Chlorine?

• +1

• +2

• -1

• 7

Which part of the heating curve shows the process of boiling?

• A

• B

• C

• D

Which part of the curve shows the state of matter liquid?

• A

• E

• C

• B

Water is unusual because its solid form (ice) floats on top of its liquid form. This is because it __________ in its solid form.

• diffuses

• expands

• contracts

• melts