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How Many Or How Much?
Test Description: Review Questions
Instructions: Answer all questions to get your test result.
1) All atoms of the same element have the same
A
mass numbers
B
number of neutrons
C
mass
D
number of protons
2) Isotopes of the same element have different
A
numbers of electrons
B
numbers of protons
C
numbers of neutrons
D
atomic numbers
3) In which of the following is the number of neutrons correctly represented?
A
fluorine: atomic numbers 9, mass 19, neutrons 0
B
uranium: atomic number 92, mass 238, neutrons 146
C
arsenic: atomic number 33, mass 75, neutrons 108
D
magnesium: atomic number 12, mass 24, neutrons 24
4) Isotopes of the same element have different
A
atomic numbers
B
positions on the periodic table
C
mass numbers
D
elemental symbols
5) 5.6 moles of gold contain how many atoms?
A
34 atoms
B
3.4 x 10^24 atoms
C
9.3 x 10^-22 atoms
D
9.3 x 10^23 atoms
6) 4.5 x 10^25 atoms of nikel equal how many moles?
A
75 mol
B
2.7 x 10^48 mol
C
0.75 mol
D
27 mol
7) For which of the following elements is the number of neutrons correctly represented, based on the atomic number and mass number given?
A
phosphorus: atomic number 15, mass 31, neutrons 19
B
neon: atomic number 10, mass 20, neutrons 9
C
potassium: atomic number 19, mass 39, neutrons 19
D
iron: atomic number 26, mass 56, neutrons 30
8) For which of the following elements is the number of neutrons correctly represented, based on the atomic number and mass number given?
A
seaborgium: atomic number 106, mass 266, neutrons 160
B
mercury: atomic number 80, mass 201, neutrons 180
C
gold: atomic number 79, mass 197, neutrons 79
D
rutherfordium: atomic number 104, mass 261, neutrons 104
9) What is the approximate mass of one mole of zinc?
A
65 g
B
30 g
C
35 g
D
6.02 x 10^23 g
10) How many moles of iridium are in 26.4 g of iridium?
A
5.06 x 10^3 mol
B
1.37 x 10^-1 mol
C
1 mol
D
7.29 mol
*select an answer for all questions
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