Across
- 1. Ability to do work
- 3. Made of atoms of different elements
- 5. ______ number is the number of protons in 1 atom
- 8. Simplest part of a compound that can exist
- 9. Bond in which atoms share electrons
- 10. Particle with a charge of 0 and a weight of 1
- 12. __________ bonds form between two water molecules
- 14. _______ electrons fit in the first orbital
- 17. Atoms are chemically _______ when the outermost orbital is full
- 18. Particle with charge of -1; moves in orbitals
- 19. All chemical reactions in an organism
Down
- 2. Speeds up a reaction
- 4. Result of a chemical reaction
- 6. Particle with a charge of +1 and weight of 1
- 7. Simplest substance of matter; cannot be broken down
- 8. Anything that occupies space and has mass
- 11. Central region of atom; protons and neutrons here
- 13. What goes into a chemical reaction
- 15. Space around nucleus where electrons move
- 16. Simplest particle of an element
- 19. How much matter an object has