Across
- 6. – elements and compounds combine to form new substances
- 8. – substance that combines with another substance in a chemical reaction
- 10. - number before a chemical formula showing how many atoms or molecules are involved in a reaction
- 11. – substance that forms when two or more elements join chemically
Down
- 1. – number to the bottom right of a chemical symbol identifying numbers of element atoms in a molecule
- 2. – two or more atoms held together by chemical bonds; smallest unit of a compound that has all the compound properties
- 3. - the letter or letters standing for a chemical element
- 4. –chemical symbols and numbers showing the kinds and numbers of atoms in a molecule
- 5. - homogeneous mixture composed of two or more substances. In such a mixture, a solute is a substance dissolved in another substance, known as a solvent.
- 7. - the basic unit of a chemical element
- 9. – a substance that cannot be broken down into simpler substances by ordinary chemical means