Solve these clues to fill the grid.
- A nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic
- 2 Across
- A stable particle with positive charge equal to the negative charge of an electron (plural)
- 4 Across
- Having a deficiency of electrons
- 7 Across
- Center of an atom or a cell
- 9 Across
- Having a surplus of electrons
- 1 Down
- A light soft silver-white metallic element of the alkali metal group
- 3 Down
- Bottom part something stands on; a safe spot in baseball (plural)
- 5 Down
- A silvery soft waxy metallic element of the alkali metal group
- 6 Down
- The smallest component of an element having the chemical properties of the element (plural)
- 8 Down