When Mercury
orbits
the
Sun,
it
gets
as
close
as
4.8
x
107
miles
to
the
Earth.

It
gets
as
far
as
1.38
x
108
miles
to
the
Earth.

What
is
the
difference
of
these
two distances

ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.

yes the answer is total mass in unchanged   : )