Across
- 5. The group that contains silicone and boron.
- 6. The smallest particle of a chemical element that can exist.
- 8. A group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.
- 10. The first element on the periodic table
- 11. A thing that is composed of two or more separate elements; a mixture.
Down
- 1. The first alkali metal
- 2. A stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron.
- 3. The arrangement of and relations between the parts or elements of something complex.
- 4. The compound that is made up of 2 hydrogen atoms and 1 oxygen atom
- 7. A species of atom having the same number of protons in its atomic nuclei.
- 9. The element that has eight protons