Across
- 2. The central part of an atom
- 5. It is one of the physical properties of matter, together with density
- 8. The temperature at which a solid becomes a liquid
- 11. A part of an atom that has no electrical charge
- 12. The temperature at which a liquid becomes a gas
- 14. A small piece of matter with a negative electrical charge
- 15. The physical substance the universe is made of
- 16. A small piece of matter with positive electrical charge
Down
- 1. It includes the study of chemical elements, compounds and chemical reactions
- 3. It is made up of two or more chemically bonded elements
- 4. A state of matter that is neither liquid nor gas
- 6. The temperature at which a liquid becomes a solid
- 7. The smallest unit of a chemical element
- 9. A state of matter that is neither liquid nor solid
- 10. A state of matter that is neither solid nor gas
- 13. It is a synonym for "state"
- 14. A chemical substance that is made of atoms all of the same kind