Across
- 1. Transfer of energy due to temperature differences between two objects
- 5. Releases energy into its surrounding
- 7. In a _______ change, there may be a change in size, shape, or phase, but no new substance is formed
- 12. In a chemical _____, atoms of the reactants unbond, rearrange, and then rebond to form the products
- 13. Has no charge and a mass of 1 amu
- 14. A tendency of matter to occupy more volume at increasing temperature: Thermal ______
- 15. The number of protons in an atom: Atomic _________.
- 17. The ratio of mass to volume
Down
- 2. A substance made of only one kind of ato
- 3. Has mass and takes up space
- 4. A measurement of average molecular motion
- 6. A substance made of two or more atoms that are connected by chemical bonds
- 8. Has a positive charge and a mass of 1 amu
- 9. Absorbs energy from its surroundings
- 10. Has a negative charge and a mass of 0 amu (1/1837 amu)
- 11. The number of protons + Neutrons in an atom: Atomic______.
- 16. An attraction formed between atoms through the sharing or transferring of electrons