How Many Or How Much? Question Preview (ID: 16415)


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Molar mass is measured in units of
a) amu
b) milliliters
c) milligrams
d) grams/mole

Isotopes of an element will always have the same
a) number of protons
b) number of neutrons
c) number of electrons
d) mass

The isotope sodium-20 has how many neutrons?
a) 9
b) 20
c) 11
d) 12

The isotope sodium-20 has how many protons?
a) 9
b) 10
c) 11
d) 12

The value of the atomic mass of an atom is
a) the sum of the mass of the protons in the atom.
b) the average mass of all the different ions of the atom.
c) the average mass of all the different isomers of the atom.
d) the average mass of all the different isotopes of the atom.

The isotope carbon-17 has how many neutrons?
a) 11
b) 10
c) 5
d) 4

The atomic mass of an atom can be found by
a) adding the number of protons and number of neutrons in the atom.
b) adding the number of protons and number of electrons in the atom.
c) adding the number of neutrons and number of electrons in the atom.
d) subtracting the number of neutrons from the number of protons in the atom.

One mole of copper equals about how many atoms?
a) 16 atoms
b) 6000 atoms
c) 6.02 x 10^23 atoms
d) 1.66 X 10^-22 atoms

Isotopes of the same element have different
a) positions on the periodic table
b) atomic numbers
c) mass numbers
d) elemental symbols

Isotopes of the same element have different
a) number of neutrons
b) number of protons
c) number of electrons
d) atomic numbers

All atoms of the same element have the same
a) number of neutrons
b) number of protons
c) mass numbers
d) mass

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