Across
- 3. ionic substances conduct electricity when aqueous or _____
- 6. a crystalline structure containing no water
- 7. increases the rate of reaction, without being used up, by providing an alternative reaction pathway with a lower activation energy
- 8. a sub-atomic particle which has no charge
- 9. a region around an atomic nucleus which can hold up to 2 electrons with opposite spins
- 11. atoms of the same element with a different number of neutrons and therefore different masses
- 13. measure of the tendency of an atom to attract a bonding pair of electrons in a covalent bond
Down
- 1. the shape of a molecule with 4 bonded electron pairs and no lone pairs
- 2. a__________ catalyst is a different physical state to the reactants
- 4. a______ covalent bond is a covalent bond in which a shared pair of electrons has been supplied by only one of the bonded atoms
- 5. a positively charged ion
- 10. a group of atomic orbitals with the same principal quantum number/energy level
- 12. the shape of a molecule with 6 bonded electron pairs and no lone pairs