Across
- 3. The mass of an atom, which is primarily determined by the number of protons and neutrons in its nucleus
- 5. Atoms of the same element that have different numbers of neutrons and therefore different atomic masses
- 7. A group of atoms bonded together
- 11. The temperature at which a substance changes from a liquid to a gas at a given pressure
- 12. A process in which one or more substances are transformed into one or more different substances
- 14. An atoms or molecule with a net electric charge
- 15. A substance that accepts protons or releases hydroxide ions in chemical reactions
- 17. The force of attraction that holds atoms together in a molecule
- 18. A chemical reaction in which a substance gains electrons, often accompanied by a decrease in oxidation state
- 20. A substance composed of two or more different elements chemically bonded together
Down
- 1. Basic Unit of an element
- 2. A substance that speeds up a chemical reaction without itself being consumed in the process
- 4. A substance consisting of atoms
- 6. A substance that takes part in a chemical reaction, undergoing change to form a new substance
- 8. An electron in the outermost shell of an atom, which determines the atom's chemical properties
- 9. The mass per unit volume of a substance; typically expressed in grams per cubic centimeter
- 10. A substance formed as a result of a chemical reaction
- 13. A substance that donates hydrogen ions and accepts electrons in chemical reactions
- 16. A scale used to measure the acidity or alkalinity of solution; uses a scale of 14, 7 is neutral, below 7 is acidic, and above 7 is basic
- 19. A chemical reaction in which a substance loses electrons, often accompanied by an increase in oxidation state.