Across
- 2. - A chemical element with the symbol H
- 5. - A group of soft, highly reactive metals
- 13. - A substance that can donate hydrogen ions
- 14. - The basic unit of a chemical element
- 16. - A chemical element with the symbol C
- 18. - A group of atoms bonded together
- 19. - A pure substance that cannot be broken down into simpler substances
- 20. - A subatomic particle with no charge
Down
- 1. - A type of chemical bond where atoms share electrons
- 3. gas - A group of elements with low chemical reactivity
- 4. - A subatomic particle with a negative charge
- 6. - A solid material that is typically shiny and malleable
- 7. - An atom with the same number of protons but a different number of neutrons
- 8. - A substance that can accept hydrogen ions
- 9. - A state of matter that has a fixed volume but no fixed shape
- 10. - A state of matter that has no fixed shape or volume
- 11. - A compound formed by the reaction of an acid with a base
- 12. - A subatomic particle with a positive charge
- 15. - A substance made up of two or more elements
- 17. - A chemical element with the symbol O