8.P.1.1 Question Preview (ID: 48911)


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What is the smallest unit of an element?
a) atom
b) crystal
c) proton
d) molecule

Which is one characteristic of some pure substances?
a) They can be homogeneous or heterogeneous.
b) They cannot be physically separated
c) They contain different types of molecules.
d)

Which best describes an element?
a) It is composed of more than one type of atom.
b) It can be broken down into simpler mixtures.
c) It can be changed into a compound.
d) It is the simplest form of matter.

Which is the best description of one particle of table salt? (NaCl)
a) element
b) compound
c) mixture
d)

When elements chemically combine, what do they form?
a) atoms
b) compounds
c) electroms
d) mixture

A substance contains 2 components joined by physical means. What best describes the substance?
a) element
b) compound
c) mixture
d) electron

An example of a homogeneous mixture is?
a) salt water
b) trail mix
c) granite
d) gold

An example of a heterogeneous mixture is?
a) tossed salad
b) gold
c) salt water
d) milk

Which is an example of an element?
a) gold
b) air
c) salt
d) salt water

Which is a pure substance
a) element
b) compound
c) mixture
d) element and compound

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