Chemistry 1

2. Numerical measurements rather than its words
3. a number that express a magnitude to a specified degree of accuracy
7. Number of protons in the nucleus in an atom
8. Smallest particle of a substance that can exist by itself
11. Experimental value minus the accepted value, divided by the accepted value and then multiplied by 100
18. Method that expresses the number multiplied by 10 and the appropriate power
19. Element with the properties of both metals and nonmetals
20. System of electrons surrounding the nucleus of an atom

1. Data in words rather than in numbers
4. Reaction in which the nuclei of one atom combines with the nuclei of another to form a larger nuclei
5. Group 18 in the periodic table with a full outer shell
6. Atoms with same number of protons but not the same number of neutrons
9. The quality of being exact
10. atom that has gained or lost one or more electrons
12. The ability to work without mistakes
13. Mass per unit of volume
14. A science that deals with the structure and properties
15. A solid that is produced by a chemical reaction in solution
16. Sum of the protons and neutrons in the nucleus of an atom
17. The heat required to raise the temperature of the mass of a given substance by given amount