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Chemistry Review
Test Description: Atom structure, bonding, pH and organic chemistry.
Instructions: Answer all questions to get your test result.
1) The substance being dissolved in solutions is known as the
A
solute
B
solvent
C
acid
D
suspension
2) What is the most stable number of valence electrons? Note: except for hydrogen and helium.
A
12
B
0
C
4
D
8
3) The atomic number of an element is based on the:
A
number of protons in its nucleus.
B
number of electrons.
C
mass of the atom.
D
number of neutrons in its nucleus.
4) When an atom loses an electron, it becomes a:
A
neutral ion
B
positive ion
C
negative ion
D
none of these
5) Substance A has a pH of 3 and Substance B has a pH of 1. Which substance is more acidic and how many times more acidic is that substance?
A
substance B, 100 times
B
substance A, 100 times
C
substance A, 10 times
D
substance B, 10 times
6) When a pair of electrons is shared unequally between two atoms, the bond formed is called a/an:
A
nonpolar covalent bond
B
polar covalent bond
C
hydrogen bond
D
ionic bond
7) How is it possible for an atom to have no charge even though it is made up of protons, neutrons and electrons?
A
All of these
B
The number of protons and electrons are equal, therefore the charge is equal
C
None of these
D
The number of electrons and neutrons are equal, so the charge is zero
8) In the shell model, the first shell can hold up to _____ electrons.
A
8
B
2
C
3
D
4
9) The particle of an atom that carries no charge is a (an)
A
proton
B
ion
C
neutron
D
electron
10) Most of the unique properties of water result from the fact that water molecules:
A
easily separate from one another
B
are polar and form hydrogen bonds
C
are held together by covalent bonds
D
form ionic bonds
11) Which of the following substances comprise (make up) a protein?
A
phospholipids
B
steriods
C
amino acids
D
polysaccharides
12) Nucleotides make up
A
lipids (fats)
B
sugars
C
proteins
D
DNA and RNA
13) A bond that involves the transfer of electrons is called a(an)
A
ionic bond.
B
electronic bond
C
hydrogen bond.
D
covalent bond.
14) This is an energy source for the cell
A
ATP
B
Secondary structure of protein
C
DNA
D
Phospholipids
15) Hydrolysis reactions break down structures using water
A
True
B
False
16) Which is the largest sugar?
A
Polysaccharides
B
Disaccharides
C
Monosaccharides
D
None of these, because they are not sugars
17) Stored form of sugar in animals
A
Protein
B
Starch
C
Glycogen
D
Lipid
18) With this protein structure, sheets and coils pack into functional structures
A
Secondary structure
B
Primary structure
C
Quaternary structure
D
Tertiary structure
19) Type of compound that consists primarily of a carbon backbone and hydrogen atoms
A
None of these
B
Inorganic
C
Both of these
D
Organic
20) Molecules that are subunits (building blocks) of polymers
A
Polymers
B
Monomers
C
Isomers
D
Triglycerides
*select an answer for all questions
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