Chemistry Vocab #1

5. System of electrons surrounding the nucleus of an atom
6. A solid that is produced by a chemical reaction in solution
10. Experimental value minus the accepted value, divided by the accepted value and then multiplied by 100
12. Atoms with same number of protons but not the same number of neutrons
15. Data in words rather than in numbers
16. atom that has gained or lost one or more electrons
17. Group 18 in the periodic table with a full outer shell
18. Mass per unit of volume
19. Number of protons in the nucleus in an atom
20. Reaction in which the nuclei of one atom combines with the nuclei of another to form a larger nuclei

1. The heat required to raise the temperature of the mass of a given substance by given amount
2. Method that expresses the number multiplied by 10 and the appropriate power
3. Smallest particle of a substance that can exist by itself
4. Element with the properties of both metals and nonmetals
7. Numerical measurements rather than its words
8. The quality of being exact
9. The ability to work without mistakes
11. A science that deals with the structure and properties
13. a number that express a magnitude to a specified degree of accuracy
14. Sum of the protons and neutrons in the nucleus of an atom