Across
- 5. abbreviations used in chemistry
- 7. a part or aspect of something abstract, especially one that is essential or characteristic.
Down
- 1. a characteristic of a substance that can be observed or measured without changing the identity of the substance.
- 2. a table of elements organized in their atom number
- 3. The mass number also called atomic mass number or nucleon number, is the total number of protons and neutrons
- 4. an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.
- 6. The number of protons in a nucleus