Across
- 2. Compound
- 5. a group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.
- 6. The basic unit of a chemical element
- 7. a part or aspect of something abstract, especially one that is essential or characteristic.
- 9. a substance made by mixing other substances together.
Down
- 1. a mathematical relationship or rule expressed in symbols.
- 2. Mixture
- 3. a thing that is composed of two or more separate elements; a mixture.
- 4. Element
- 8. physical substance in general, as distinct from mind and spirit; (in physics) that which occupies space and possesses rest mass, especially as distinct from energy.