Chapter 2 Minerals

An element is a substance that

• exists naturally as a solid, liquid, and gas.

• cannot be broken down into simpler substances.

• is above 86 on the periodic table.

• can be broken down only by chemical means.

Which particles make up atoms?

• protons, neutrons, electrons

• protons, electrons, nuclei

• electrons, neutrons, ions

• neutrons, electrons, molecules

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Which of the following is an element?

• water

• hydrogen

• air

• carbon dioxide

When elements are more stable in a combined form, which of the following forms?

• atoms

• metals

• nuclei

• compounds

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A compound contains two or more

• elements physically combined.

• simple substances.

• elements chemically combined.

• nuclei combined with electrons/.

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Isotopes are atoms of an element

• with the same number of electrons but different numbers of protons.

• that are radioactive.

• with a magnetic charge.

• with the same number of protons but different number of neutrons.

Chemical bonds are likely to form when

• two atoms have the same number of electrons.

• an atom's outer energy level doesn't have the maximum number of electrons.

• at atom's nucleus has the same number of protons as neutrons.

• an atom's outer energy level is filled.

Crystallization from cooling magma describes one way that

• atoms bond.

• ions combine.

• protons attract electrons.

• minerals form.

What process causes dissolved substances to be left behind to form crystals after water in lakes or ponds evaporates?

• precipitation

• ionization

• condensation

• sublimation

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Minerals are classified according to their

• color.

• origin.

• composition.

• specific gravity.