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Multiple Choice Quiz
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1
An electrically charged small negative particle which encircles a nucleus is the _____.
A)proton
B)neutron
C)electron
D)positron
2
The nucleus of an atom always has a(n) _____ charge.
A)unstable
B)positive
C)negative
D)neutral
3
What is the charge of an elemental atom?
A)negative
B)positive
C)neutral
D)constantly changing
4
Which of these has the highest atomic weight?
A)magnesium
B)fluorine
C)lithium
D)sodium
5
Two atoms with the same atomic number but different atomic weights are called _____.
A)elements
B)isotopes
C)molecules
D)radioactive
6
What does a radioactive element do?
A)loses neutrons
B)loses protons
C)undergoes nuclear disintegration
D)changes their electron shells
7
When atoms react chemically they gain, lose, or share _____.
A)protons
B)electrons
C)neutrons
D)atomic weights
8
Radiation in the form of two protons and two neutrons is the _____.
A)gamma ray
B)electron
C)beta particle
D)alpha particle
9
Which of these can be used to detect heart disease?
A)iodine-131
B)gallium-67
C)thallium-201
D)cobalt-60
10
Why is iodine-131 used to assess thyroid function?
A)it has a short half-life
B)it becomes absorbed into tissues
C)it is radioactive
D)the thyroid gland uses iodine
11
The second electron shell can hold a maximum of _____ electrons.
A)2
B)4
C)6
D)8
12
The only elements that have eight electrons in their outer orbitals and are therefore stable are the _____.
A)metals
B)non-metals
C)gases
D)noble gases
13
Chemically stable elements will not _____ under ordinary conditions.
A)become radioactive
B)chemically react
C)disintegrate
D)undergo nuclear decay
14
What happens to sodium when it loses its outer electron?
A)it becomes a negative ion
B)it becomes radioactive
C)it becomes a positive ion
D)nothing
15
In table salt, _____ bonds hold the ions together.
A)electrovalent
B)electrostatic
C)covalent
D)hydrogen
16
What causes HCl to become an acid?
A)the ionic forces
B)covalent exchanges with water
C)the release of H+
D)the presence of H+
17
A covalent bond is formed whenever two atoms ______ electrons.
A)lose
B)share
C)gain
D)keep their
18
Carbon atoms tend to form _____.
A)covalent bonds
B)cations
C)anions
D)ionic bonds
19
Buildings that contain radon in their structures can cause illness because radon will _____.
A)chemically react with human tissues
B)produce ionizing radiation
C)be absorbed into the blood
D)disintegrate
20
When atoms of different elements combine they form _____.
A)gases
B)compounds
C)molecules
D)ionic bonds
21
The _____ is the smallest particle of an element, which has the properties of the element.
A)atom
B)electron
C)ion
D)molecule
22
_____ formulas display the relative positions of each atom within a molecule.
A)Empirical
B)Structural
C)Molecular
D)Nuclear
23
Decomposition is the opposite of a _____ reaction.
A)synthesis
B)ionic
C)nuclear
D)exchange
24
What is the term for a substance that can increase the rate of a reaction without becoming changed?
A)reactant
B)product
C)catalyst
D)electrolyte
25
Sodium chloride is an example of a/an _____.
A)base
B)acid
C)electrolyte
D)ion
26
The following are all electrolytes except which one?
A)NaOH
B)glucose
C)carbonic acid
D)aluminum chloride
27
A solution with a pH of 7.35 is considered to be _____.
A)acidic
B)neutral
C)basic
D)normal
28
What is the most abundant compound in the human body?
A)water
B)oxygen
C)carbon
D)protein
29
What is the main purpose for cellular oxygen?
A)transports heat
B)acts as a solvent
C)results in energy
D)it is exchanged for carbon dioxide
30
Which inorganic ion is required for ATP and nucleic acid synthesis and is part of their structures?
A)magnesium
B)K+
C)bicarbonate
D)phosphate
31
The following are monosaccharides except which one?
A)glucose
B)sucrose
C)fructose
D)galactose
32
Glycogen is a type of _____ and is a storage form of sugar.
A)monosaccharide
B)disaccharide
C)polysaccharide
D)milk sugar
33
Lipids include the following except which one?
A)fats
B)oils
C)steroids
D)lactose
34
If a triglyceride were digested it would break down into glycerol and _____.
A)fatty acids
B)nitrogen
C)a saccharide
D)a lipid
35
Unsaturated fats are comprised of lipids that contain ____.
A)nitrogen
B)no double bonds
C)many hydrogen atoms
D)relatively few hydrogen atoms
36
The following are steroids except which one?
A)cholesterol
B)estrogens
C)testosterone
D)phospholipid
37
Proteins are most important for the following functions except which one?
A)hormone structures
B)energy production
C)cell structures
D)antibodies
38
All nucleic acids must contain which of the following?
A)phosphate group
B)amino acids
C)ribose
D)deoxyribose
39
The molecule which contains the genetic information necessary to regulate cells is _____.
A)RNA
B)DNA
C)protein
D)ATP







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