Across
- 4. Smallest known particle
- 7. Metal+Oxygen=
- 8. The number of protons contained in an atom
Down
- 1. The number of protons and neutrons contained in the atom
- 2. The most electronegative element
- 3. The burning of a substance in oxygen is an example of ...
- 5. 31 on the periodic table
- 6. Combustion is an ... reaction
- 9. A bunch of different atoms bonded together