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When Dalton first proposed the atom, very little was known about it. Many years and experiments later, our understanding of the atom has grown immensely.

Fill in the blanks below to describe our basic, modern view of the atom.

According to the Nuclear Model of the Atom, there is a small, dense nucleus at the center of the atom. This nucleus contains
Select Option protonsneutronselectronsphotons
which are positively charged and
Select Option protonsneutronselectronsphotons
which are
Select Option positively chargednegatively chargedneutral
. Surrounding the nucleus is a cloud of
Select Option protonsneutronselectronsphotons
which are
Select Option positively chargednegatively chargedneutral
.
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