Across
- 3. A column in the periodic table of the chemical elements
- 4. Smallest unit of matter
- 5. The number of a chemical element in the periodic system
- 10. Negative
- 11. A substance made up of different elements joined together by a chemical bond
Down
- 1. A tabular display of the chemical elements
- 2. Neutral
- 6. the building blocks for all the rest of the matter in the world
- 7. Positive
- 8. An electrically neutral group of two or more atoms held together by chemical bonds
- 9. A row of chemical elements