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Biology Chapter 4
Test Description: More detailed review of chapter 4: Chemical Basis for Life
Instructions: Answer all questions to get your test result.
1) Anything that occupies space and has mass is --
A
an atom
B
matter
C
an element
D
a compound
2) A pure substance that can't be chemically broken down any further is --
A
matter
B
a compound
C
an element
D
an atom
3) A substance with a fixed ratio made of multiple elements chemically bound is --
A
an element
B
an atom
C
matter
D
a compound
4) The smallest possible particle in an element is --
A
an element
B
matter
C
a compound
D
an atom
5) The atomic number is the number of
A
nuclei
B
protons
C
neutrons
D
electrons
6) Which of the below is false about isotopes?
A
They have a regular number of protons
B
Radioactive isotopes' nuclei break down
C
They have a regular number of neutrons
D
Radioactive isotopes can emit radiation
7) An ionic bond _____ electrons in atoms
A
compares
B
shares
C
transfers
D
transports
8) Covalently bonded atoms --
A
transfer electrons
B
all of the above
C
have as many bonds as needed electrons
D
create ions
9) Molecules cannot be represented by a --
A
space-filling model
B
chemical formula
C
chemical reaction
D
structural formula
10) A chemical reaction --
A
forms new bonds by releasing energy
B
all of the above
C
absorbs energy to break bonds
D
only rearranges atoms
*select an answer for all questions
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