Weegy: The energy levels of an atom are occupied by electrons.
User: Which group of elements has a stable number of electrons in their outer energy level?
a.
Noble Gases
c.
Halogens
b.
Alkali Metals
d.
Alkaline Earth Metals
Weegy: Noble Gases has a stable number of electrons in their outer energy level.
User: A mixture is different from a compound because each substance in a mixture
a.
retains its own properties.
c.
forms an ion.
b.
changes its electric charge.
d.
changes from a solid to a liquid.
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