Across
- 2. Any material that is made up of only one type of atom.
- 4. Any subatomic particle found in the atomic nucleus; another name for either a proton or a neutron.
- 7. An abbreviation for an element or atom.
- 8. any member of a set of atoms of the same element whose nuclei contain the same number of protons but different numbers of neutrons.
- 9. A representation of a system that helps us predict how the system behaves.
- 10. A vertical column in the periodic table; also known as a family of elements.
Down
- 1. 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.
- 3. A chart in which all known elements are listed in order of atomic number.
- 5. A count of the number of protons in the atomic nucleus.
- 6. A notation that uses the atomic symbol and (sometimes) a numerical subscript to denote how many atoms are bonded in one unit of an element.