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What phase change involves adding energy?

• boiling

• freezing

• deposition

Which has more energy?

• solid

• liquid

• gas

Of the following, which is an element? Use your periodic table.

• carbon dioxide

• water

• nickel

• sugar

Which is a pure substance

• a compound

• gravel

• cereal in milk

• any type of mixture

Which is a physical property and which is a chemical propterty

• burning a piece of paper and then burning a piece of wood

• folding a piece of paper and then folding a piece of aluminum

• folding a piece of paper and then burning a piece of wood

How do you find density?

• multiply mass and volume

• multiply density and mass

• divide mass by volume

Greatest density?

• mass of 1 gram, volume of 1000 ml

• mass of 10 grams and volume of 1000 ml

• mass of 1000 grams and volume of 10 ml

• mass of 1000 grams and volume of 1 m

Sulfur has 6 electrons, if we add 2 electrons, it becomes what? positive or negative? electrons are negative by the way, it will then have 8 electrons

• positive

• negative

Diatomic means two elements that are the same. Elements in family 7 are diatomic.

• F

• Mg

• S

• O

If you put Na (Sodium) and OH (hydroxide) together it is called

• sodium oxygen

• nitrogen hydroxide

• sodium hydroxide