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