Compounds & Mixtures Final Review

Compounds are chemically combined.

• True

• False

Atoms contain which subatomic particles?

• protons, nucleus, electrons

• protons, neutrons, electrons

• photons, neutrons, electrons

• photons, nucleus, electricity

__________ have a positive charge.

• electrons

• neutrons

• protons

__________ have a neutral charge.

• electrons

• neutrons

• protons

__________ have a negative charge.

• electrons

• neutrons

• protons

What is made of 2 or more different elements chemically combined?

• compounds

• atoms

• mixtures

• elements

JimBob says water is NOT a compound. He says only hydrogen is used to make water. What is wrong with this?

• Water is a compound because it is made of hydrogen which is made of 2 types of atoms.

• Water is a compound because compounds are only made up of 1 type of element.

• Water is a compound because compounds must contain two or more elements, and oxygen is also combined with hydrogen to make water.

Which of the following is not a compound?

• HCl

• Cl

• NaCl

• CO₂

If the substances that make up a mixture are not the same throughout, the mixture is called...

• Homogeneous

• Heterogeneous

• Compounds

• Pure substance

Which is the best example of a pure substance?

• pizza

• gold

• saltwater

• air