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The unit for atomic mass is
a weighted average of the masses of an element's isotopes
amu
argon and krypton
atomic number
gases
increases from top to bottom within the group
nonmetal flourine
one or seven valence electrons
Among the alkali metals, the tendency to react with other substances
a weighted average of the masses of an element's isotopes
amu
argon and krypton
atomic number
gases
increases from top to bottom within the group
nonmetal flourine
one or seven valence electrons
Two highly reactive elements in period 2 are the metal lithium and the
a weighted average of the masses of an element's isotopes
amu
argon and krypton
atomic number
gases
increases from top to bottom within the group
nonmetal flourine
one or seven valence electrons
Moving from left to right across a row of the periodic table, which of the following values increases by exactly one from element to element
a weighted average of the masses of an element's isotopes
amu
argon and krypton
atomic number
gases
increases from top to bottom within the group
nonmetal flourine
one or seven valence electrons
Which of the following gases emit colors when an electric current is applied?
a weighted average of the masses of an element's isotopes
amu
argon and krypton
atomic number
gases
increases from top to bottom within the group
nonmetal flourine
one or seven valence electrons
At room temperature, none of the metals are
a weighted average of the masses of an element's isotopes
amu
argon and krypton
atomic number
gases
increases from top to bottom within the group
nonmetal flourine
one or seven valence electrons
Atoms of the most reactive elements tend to have
a weighted average of the masses of an element's isotopes
amu
argon and krypton
atomic number
gases
increases from top to bottom within the group
nonmetal flourine
one or seven valence electrons
The atomic mass of an element is
a weighted average of the masses of an element's isotopes
amu
argon and krypton
atomic number
gases
increases from top to bottom within the group
nonmetal flourine
one or seven valence electrons
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