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