Across
- 1. A horizontal row in the periodic table.
- 5. Positively charged subatomic particle found in the nucleus.
- 7. The number of protons in an atom.
- 9. Elements in Group 7 of the periodic table.
- 10. bond Electrostatic attraction between oppositely charged ions.
- 11. Negatively charged subatomic particle orbiting the nucleus.
Down
- 2. Atoms of the same element with different numbers of neutrons.
- 3. A vertical column in the periodic table.
- 4. The central part of an atom containing protons and neutrons.
- 5. table An arrangement of elements by atomic number.
- 6. bond A bond formed by the sharing of electrons.
- 7. metals Elements in Group 1 of the periodic table.
- 8. number The total number of protons and neutrons in an atom.
- 12. Neutral subatomic particle found in the nucleus.