Unit 1 and 2 Vocabulary

1. The region around the nucleus where electrons are likely to be found
3. energy The energy of moving particles in a substance, related to temperature
6. The center part of an atom containing protons and neutrons
11. The total heat content of a system
13. Neutral subatomic particles that reside in the nucleus of an atom
15. law A principle stating that the total heat change in a reaction is the same, regardless of the steps taken
16. A pure substance consisting of only one type of atom
17. The process of measurement heat changes in a chemical reaction
20. transfer The movement of heat from one object or substance to another
21. Positively charged subatomic particles located in the nucleus of an atom
22. The umber of waves that pass a given point per unit of time
23. The distance between successive peaks of a wave

1. A measurement of the disorder or randomness in a system; higher entropy means more disorder
2. The study of how heat is involved in chemical reactions
4. energy The minimum energy needed for a reaction to occur
5. spectrum The range of all types of electromagnetic radiation
7. A unit of energy used to measure heat
8. Everything outside of the system being studied
9. The smallest unit of chemical element
10. A fundamental property of electrons that describe their intrinsic angular momentum
12. The part of the universe being studied in a chemical reactions
14. levels The fixed energies an electron can have in an atom
15. A from of energy that can be transferred between objects
18. A measurement of how hot or cold something is
19. table A tabular arrangements of the chemical elements, organized by atomic number