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3. a region around the nucleus of an atom
where electrons are likely to be found.
6. the number of protons in the nucleus of an
atom.
7. the smallest particle into which an element
can be divided.
8. the sum of the number of protons and
neutrons in the nucleus of an atom.
9. negatively charged particles found within
the electron cloud.
1. positively charged particles found in the
nucleus.
2. an arrangement of the elements in order of
their atomic numbers such that elements with
similar properties fall in the same group.
4. uncharged particles that are found within
the nucleus of an atom.
5. the center of an atom made up of protons
and neutrons.