Across
- 2. a particle that consists of protons and neutrons
- 4. Potential of hydrogen
- 5. is a thing that is composed of two or separate elements
- 6. anything that occupies space
- 7. Complex compound of high molecular weight (Ribonucleic acid)
- 9. distinct nuclear species of the same element
- 10. made up of atoms with the same number of protons
- 12. proton acceptor
- 13. can donate a proton to another substance
Down
- 1. large group of organic compounds
- 3. self-replicating material and carrier of genetic information
- 4. compounds of amino acids
- 6. density and type of atoms in a given object
- 8. group of atoms bonded together
- 11. how quickly a substance decreases in concentration