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