Chemistry

2. The release or absorption of _____ during a reaction often indicates a chemical change
5. A physical change of a solid becoming a liquid
10. In a chemcial reaction, the substances that react are called _____
11. The production of a solid called a _____ during a reaction is evidence of a chemical reaction
12. The amount of matter found in an object
14. The density of water is roughly _____g/mL
15. Mass is measure in this unit
16. The center of an atom, containing protons and neutrons
18. A physical change of a liquid turning into a gas
19. Dissolving sugar in water is a good example of _____
22. The ability of a substance to burn
25. The amount of space an object occupies
26. The change in which a substance cannot be returned to its original form
27. A _____ subtance contains only one type of molecule

1. The smallest unit of an element that maintaines the properties of that element is called an ____
3. Negatively charged subatomic particles
4. The measure of how much mass is contained in a given volume
6. A substance that contains molecules of different types
7. When iron _____, it undergoes a chemical change because a new sunstance is formed
8. The equation to calculate density
9. The force of gravity on an object's mass
11. Positively charged subatomic particles
13. The production of an _____ or smell can indicate a chemical change
17. The change in the appearance of a substance
20. _____ are formed when a gas is release in a reaction
21. Mixing calcium chloride with cabbage juice caused a _____ change
23. Volume is measured in this unit
24. When mixing substances you may feel an increase or decrease in _____