Across
- 4. atom / contains one proton in its nucleus. This is balanced by one orbiting electron.
- 6. current /periodically reverses direction.
- 7. current / moves in one direction.
- 8. /be defined as a path for current flow and has three key characteristics .
- 9. /smallest particle of electric charge having the characteristic called positive polarity.
- 10. current / considered as the motion of positive charges.
Down
- 1. /are materials that are neither good conductors nor good insulators.
- 2. number /of an element is the number of protons in the nucleus of the atom .
- 3. / smallest particle of electricity .
- 5. valence /an atom is the number of electrons in an incomplete outermost shell.