Across
- 2. An extremely small, negatively charged subatomic particle found in a cloud outside the atomic nucleus.
- 5. A representation of an object on some convenient scale.
- 6. The mass of an elements atoms;listed in the periodic table as an average value based on the relative abundance of the element's isotopes.
- 10. Any material that is made up of only one type of atom.
- 11. In the context of physics, the time required for a vibration or a wave to make one complete cycle. In chemistry, a horizontal row in the periodic table
Down
- 1. A chart in which all known elements are listed in order of atomic number.
- 3. Any subatomic particle found in the atomic nucleus; another name for either a proton or a neutron.
- 4. a count of the number of protons in the atomic nucleus.
- 7. A positively charged subatomic particle in the atomic nucleus.
- 8. An electrically neutral subatomic particle in the atomic nucleus.
- 9. A vertical column in the periodic table; also known as a family of elements.