crossword

1. The highest part of a transverse wave
2. A short, easy way to show a chemical reaction, using symbols
7. The principle stating that matter is not created or destroyed during a chemical reaction
8. The average mass of all the isotopes of an element
10. A form of potential energy that is stored in chemical bonds between atoms
12. The temperature at which no more energy can be removed from matter
13. A characteristic of a pure substance that describes its ability to change into a different substance
16. A pure substance that cannot be broken down into other substances by chemical or physical means
17. The rate at which velocity changes
18. Electromagnetic waves with the shortest wavelengths and highest frequencies
19. A number in front of a chemical formula in an equation that indicates how many molecules or atoms of each reactant and product are involved in a reaction
21. The temperature at which a substance changes from liquid to gas
22. A combination of symbols that represents the elements in a compound and their properties
24. An atom or group of atoms that has become electrically charged
25. The ratio of the mass of the substances to its volume

1. A change in which one or more substances combine or break apart to form new substances
3. The number of protons in the nucleus of an atom
4. The force that one surface exerts on another when the two surfaces rub against each other
5. The force that pulls objects toward each other
6. The maximum distance the particles of a medium move away from their rest positions as a wave passes through the medium
9. The process in which substances undergo chemical changes that result in the formation of new substances
11. A pure substance made of two or more elements chemically combined
14. A negatively charged particle that is found outside the nucleus of an atom
15. A push or pull exerted on an object
20. The number of complete waves that pass a given point in a certain amount of time
23. The basic particle from which all elements are made