Across
- 1. a vertical column in the periodic table; also known as a family of elements\
- 3. An extremely small, negatively charged subatomic particle found in a cloud outsside the atomic nucleusE
- 7. A small, discrete packet of light energy
- 8. table A chart in which all known elements are listed in order of atomic number
- 9. mass the mass of an element's atoms; listed in the periodic table as an average value based on the relative abundance of the element's isotopes
- 10. model A representation of an object on some convenient scale
Down
- 2. A positively charged subatomic particle in the atomic nucleus
- 3. formula a notation that uses the atomic symbol and (sometimes) a numerical subscipt to denote how many atoms are bonded in one unit of an element
- 4. model a representation of a system that helps us predict how the system behaves
- 5. An electrically neutral subatomic particle in the atomic nucleus
- 6. 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