Biology Chapter 4: Question Preview (ID: 3131)

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Anything that occupies space and has mass is --
a) matter
b) an element
c) a compound
d) an atom

A pure substance that can't be chemically broken down any further is --
a) matter
b) an element
c) a compound
d) an atom

A substance with a fixed ratio made of multiple elements chemically bound is --
a) matter
b) an element
c) a compound
d) an atom

The smallest possible particle in an element is --
a) matter
b) an element
c) an atom
d) a compound

The atomic number is the number of
a) electrons
b) protons
c) neutrons
d) nuclei

Which of the below is false about isotopes?
a) They have a regular number of neutrons
b) Radioactive isotopes can emit radiation
c) Radioactive isotopes' nuclei break down
d) They have a regular number of protons

An ionic bond _____ electrons in atoms
a) shares
b) transfers
c) transports
d) compares

Covalently bonded atoms --
a) create ions
b) have as many bonds as needed electrons
c) transfer electrons
d) all of the above

Molecules cannot be represented by a --
a) chemical formula
b) structural formula
c) space-filling model
d) chemical reaction

A chemical reaction --
a) absorbs energy to break bonds
b) forms new bonds by releasing energy
c) only rearranges atoms
d) all of the above

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