Across
- 5. Symbols used to show the atomic make up of a molecule
- 8. an average atomic mass based on numbers of an element’s isotopes found in nature
- 10. a heavier unstable element that breaks down (decays) to a lighter more stable element
Down
- 1. the total number of protons plus neutrons in an atom
- 2. the process of radioisotope decay
- 3. sentence used to show the reactants and products of a chemical reaction
- 4. chemicals at the beginning of the chemical reaction
- 5. Small particles formed when atoms form chemical bonds
- 6. chemicals formed at the end of a chemical reaction
- 7. an atom with an unusual number of neutrons
- 9. A charged atom (an atom having an unequal number of protons and neutrons)