Across
- 4. Versions of the same element with different numbers of neutrons.
- 7. Any particle smaller than an atom
- 9. Atom with a charge (unequal number of protons and electrons)
- 10. The positively charged core of an atom, made up of neutrons and protons
Down
- 1. The sum of the protons and neutrons in the nucleus of an atom.
- 2. The basic unit on which all matter is made
- 3. A subatomic particle without an electric charge
- 5. A subatomic particle with a negative electrical charge
- 6. This number identifies the element and is equal to the number of protons found in the nucleus.
- 8. A subatomic particle with a positive electrical charge