Solve these clues to fill the grid.
- Two or more atoms bound together as a single unit and forming part of a molecule
- 3 Across
- Of or being a nonmetallic element that has some of the properties of ___
- 5 Across
- Any of the bivalent metals of group II of the periodic table
- 7 Across
- An amount of time
- 8 Across
- Any of several chemical elements that are usually shiny solids that conduct heat or electricity (plural)
- 9 Across
- The act of passing from one state or place to the next
- 11 Across
- Any of the chemically inert ___ elements of the helium group in the periodic table
- 12 Across
- A chemical element lacking typical metallic properties (plural)
- 1 Down
- Any of five related nonmetallic elements that are all monovalent and readily form negative ions (plural)
- 2 Down
- Any of the monovalent ___ of group I of the periodic table (plural)
- 4 Down
- The principle that chemical properties of the elements are ___ functions of their atomic
- 6 Down
- Russian chemist who developed a periodic table of the chemical elements and predicted the discovery
- 10 Down