Multiple choice

If not all the outer electrons are used up in bonding the molecule will...

  1. be hard

  2. melt easily

  3. be soft

  4. conduct electricity

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

When carbon atoms only form three bonds (as in graphite), the fourth outer electron becomes delocalized. These delocalized electrons are free to move and carry charge, allowing the substance to conduct electricity.