Across
- 3. - The electrons in the outermost shell of an atom.
- 5. - Type of bond formed by the sharing of electrons between atoms.
- 7. - The phase transition from solid to gas without passing through the liquid state.
- 9. - A compound that contains water molecules within its crystal structure.
- 10. - The table that organizes elements by their chemical properties.
- 11. - Atoms of the same element with different numbers of neutrons.
- 14. - The energy required to remove one mole of electrons from one mole of gaseous atoms.
- 16. - Type of bond formed by the transfer of electrons.
- 17. - A reaction where an atom gains electrons.
- 19. - The attraction between atoms that allows the formation of chemical substances.
Down
- 1. - The study of the rates of chemical reactions.
- 2. - The SI unit for the amount of substance.
- 4. - A substance that speeds up a chemical reaction without being consumed.
- 6. - The number of particles in one mole of a substance.
- 8. - A subatomic particle with a negative charge.
- 10. - The number of protons in an atom's nucleus.
- 12. - The simplest whole-number ratio of elements in a compound.
- 13. - A subatomic particle with no charge found in the nucleus.
- 15. - A reaction where an atom loses electrons.
- 18. - A type of reaction that absorbs heat from the surroundings.