Click on the radio buttons in front of the correct answers to the questions.
1. This is the smallest particle of an element.
atom compound mixture
2. This is a substance made up of only one kind of atom.
mixture compound element
3. The center of the atom that contains the proton and neutron is the
electron nucleus orbit
4. An atom with more neutrons than protons is called a/an
element compound isotope
5. The part of the atom with a positive charge is the
proton neutron electron
6. The part of the atom with a negative charge is the
7. Most of the mass of an atom is in the nucleus.
True False
8. The total number of protons in the atom is its
atomic weight atomic energy atomic number
9. The sum of the protons and neutrons in an atom is its
10. The part of the atom that orbits the nucleus is the
11. The chemical combination of two or more atoms in fixed amounts is called a
mixture orbit compound
12. The smallest part of a compound that still is that compound is a
mixture molecule nucleus