Solve these clues to fill the grid.
- A particle that is electrically charged
- 3 Across
- A substance formed by chemical union of two or more elements or ingredients in definite proportion
- 4 Across
- Of or relating to or characterized by ___
- 6 Across
- A substance that initiates or accelerates a chemical reaction without itself being affected
- 7 Across
- An essential structural component of living cells and source of energy for animals
- 12 Across
- The dialect of Ancient Greek spoken and written in Attica and Athens and ___
- 13 Across
- A homogeneous mixture of two or more substances
- 15 Across
- Occurring or formed with absorption of heat
- 1 Down
- The ___ that is acted upon by an enzyme or ferment
- 2 Down
- Any of several complex proteins that are produced by cells and act as catalysts in specific
- 5 Down
- Substance used in or made by chemistry
- 7 Down
- Occurring or formed with the liberation of heat
- 8 Down
- A rotund individual
- 9 Down
- Any of various water-soluble compounds having a sour taste and capable of turning litmus red
- 10 Down
- A nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic
- 11 Down
- An electrical force linking atoms
- 14 Down