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