Across
- 2. a neutral particle having equal numbers of protons and electrons
- 5. how close a measured value is to an accepted value
- 8. a way to convert measurements to a different unit.
- 9. atoms of the same element with different amount of neutrons
- 13. how close a series of measurements are to each other
- 15. number of protons in the nucleus
- 17. the measure of kinetic energy in a sample of matter
- 19. study of how heat is converted to and from other forms of energy
- 20. Has a Ph level less than 7
- 21. time it takes for half of the radioactive atoms of a specific radioactive isotope to decay
Down
- 1. the mass of an atom given in amu
- 3. standard unit that stands for 6.02 x 10^23
- 4. the concave surface of a liquid
- 6. positively charged ion
- 7. created the 1st periodic table
- 10. A reaction where heat is absorbed
- 11. A reaction where heat is released
- 12. a ratio that compares the mass of an object to its volume
- 14. atoms that have either gained or lost electrons so that it is no longer electrically neutral
- 16. the change in heat of the products from the reactants
- 18. Has a Ph level higher than 7