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How Many Or How Much?
Test Description: Chemistry Review
Instructions: Answer all questions to get your test result.
1) All atoms of the same element have the same
A
number of protons
B
number of neutrons
C
mass
D
mass numbers
2) Isotopes of the same element have different
A
number of neutrons
B
number of electrons
C
atomic numbers
D
number of protons
3) Isotopes of the same element have different
A
mass numbers
B
atomic numbers
C
positions on the periodic table
D
elemental symbols
4) One mole of copper equals about how many atoms?
A
6000 atoms
B
16 atoms
C
1.66 X 10^-22 atoms
D
6.02 x 10^23 atoms
5) The atomic mass of an atom can be found by
A
adding the number of protons and number of electrons in the atom.
B
adding the number of neutrons and number of electrons in the atom.
C
subtracting the number of neutrons from the number of protons in the atom.
D
adding the number of protons and number of neutrons in the atom.
6) The value of the atomic mass of an atom is
A
the average mass of all the different ions of the atom.
B
the average mass of all the different isomers of the atom.
C
the average mass of all the different isotopes of the atom.
D
the sum of the mass of the protons in the atom.
7) The isotope carbon-17 has how many neutrons?
A
11
B
10
C
4
D
5
8) The isotope sodium-20 has how many neutrons?
A
9
B
11
C
20
D
12
9) The isotope sodium-20 has how many protons?
A
11
B
9
C
10
D
12
10) Isotopes of an element will always have the same
A
number of protons
B
number of neutrons
C
mass
D
number of electrons
11) Molar mass is measured in units of
A
amu
B
milliliters
C
milligrams
D
grams/mole
*select an answer for all questions
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