Across
- 2. The building blocks of matter
- 7. __________ Isotopes are broken down by radiation when the nucleus of an atom breaks up
- 10. The beginning portion of a chemical reaction
- 11. A compound in which the atoms are held together by covalent bonds.
- 12. The neutral part of an atom
- 13. The positively charged part of an atom
- 15. Atoms of the same element that have the same number of protons and electrons but have a different number of neutrons
- 18. Carbon ____________ happens when nitrogen becomes carbon through beta decay
- 19. __________-12 is used to date substances that have once been alive
Down
- 1. A pure substance that cannot be broken down by physical means and found on a table
- 3. Are the process by which atoms or groups of atoms in substances are reorganized into different substances
- 4. ____________ bonds occur when electrons are shared
- 5. ____________ = Atoms
- 6. Neutrons and Protons are located in the __________
- 8. The study of matter
- 9. Part of the atom located on the outside of the nucleus
- 14. A pure substance that cannot be broken down by physical means that contains more than one element
- 16. The result of a chemical reaction
- 17. ________ bonds occur when electrons are transferred