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1
Chemistry is the discipline that studies
A)various forces of the physical world.
B)electrical charges.
C)the composition of matter and how it changes.
D)the interaction of elements and living organisms.
2
The smallest complete units of elements are
A)neutrons
B)electrons
C)atoms
D)protons
3
What are the components of an atom that determine its electrical charge?
A)electrons and protons
B)protons and neutrons
C)electrons
D)neutrons
4
In a neutral atom, the number of electrons in its outer rings ___________ the number of protons in the nucleus.
A)equals
B)is less than
C)is more than
D)has no relationship to
5
The defining characteristic of stable or inert atoms is
A)a high atomic weight
B)a low atomic number
C)having the maximum number of electrons in its outer shell
D)a positive electrical charge
6
Atoms that have gained an electrical charge by gaining or losing electrons are called
A)elements
B)molecules
C)compounds
D)ions
7
Polar molecules have unique bonds in which electrons are
A)shared equally
B)lost by one atom
C)gained by one atom
D)shared unequally
8
Hydrogen bonds can be found in
A)protein molecules
B)gaseous oxygen
C)carbohydrate molecules
D)inorganic molecules exclusively
9
Table sugar, baking soda, natural gas, and alcoholic beverages are examples of
A)inorganic substances
B)elements
C)compounds
D)particles
10
The reaction of HCl with NaOH to form NaCl and H2O is an example of
A)decomposition
B)an exchange reaction
C)synthesis
D)a catalyst





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