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Biology
Test Description: Ch2 Test
Instructions: Answer all questions to get your test result.
1) The space surrounding the nucleus of an atom contains
A
electrons
B
neutrons
C
ions
D
protons
2) Which one the following makes up a molecule of water?
A
two atoms of hydrogen and one atom of oxygen
B
one atom of Hydrgen and one atom of Oxygen
C
one atom of sodium and one atom of chlorine
D
one atom of hydrogen and 2 atoms of oxygen
3) When salt is dissolved in water, water is the
A
solute
B
solvent
C
reactant
D
solution
4) A substance with a pH of 6 is called
A
a base
B
an acid
C
both acid and a base
D
neither an acid or a base
5) The three particles that make up an atom are
A
positives, negatives and elctrons
B
protons, neutrons and electrons
C
protons, neutrons, and isotopes
D
neutrons, isotopes and electrons
6) The nucleus is makde of
A
protons and electrons
B
protons, electrons, and neutrons
C
elctrons and neutrons
D
protons and neutrons
7) A covalent bond is formed as the result of
A
transferring electrons
B
sharing electrons
C
transferring protons
D
sharing prontons
8) A soloution is a(an)
A
breaking of a chemical bond
B
combinations of two or more liquids
C
chemical reaction
D
evenly distributed mixture of 2 or more substances
9) Suspensions are mixtures
A
of water and nondissolved material
B
neither a or b
C
in which the components are evenly distributed throughout the solution
D
both a and b
10) Which of the following terms describes a substance formed by the combination of two or more elements in definite proportions?
A
compound
B
isotope
C
enzyme
D
nucleus
*select an answer for all questions
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