Across
- 1. Sum of the protons and neutrons in the nucleus of an atom
- 6. Smallest particle of a substance that can exist by itself
- 8. atom that has gained or lost one or more electrons
- 9. Reaction in which the nuclei of one atom combines with the nuclei of another to form a larger nuclei
- 11. A science that deals with the structure and properties
- 12. Numerical measurements rather than its words
- 13. Data in words rather than in numbers
- 16. The quality of being exact
- 17. Atoms with same number of protons but not the same number of neutrons
- 19. Mass per unit of volume
- 20. Experimental value minus the accepted value, divided by the accepted value and then multiplied by 100
Down
- 2. Method that expresses the number multiplied by 10 and the appropriate power
- 3. System of electrons surrounding the nucleus of an atom
- 4. A solid that is produced by a chemical reaction in solution
- 5. Group 18 in the periodic table with a full outer shell
- 7. Number of protons in the nucleus in an atom
- 10. a number that express a magnitude to a specified degree of accuracy
- 14. The ability to work without mistakes
- 15. The heat required to raise the temperature of the mass of a given substance by given amount
- 18. Element with the properties of both metals and nonmetals