55:58 Which arrow represents the change of state
described above?
The diagram shows changes of state between solid,
liquid, and gas. The atoms of a substance lose
energy during a change of state. Before the change,
the atoms are close together but are able to slide
past one another.
gas

od Z3
o
M
N
P
solid
liquid
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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.