Properties of covalent compounds include: (more than 1 may be selected)
a) higher melting and boiling points than ionic compounds
b) poor electrical conductors as solids
c) contain the strongest types of bonds
d) held together by electrostatic force
e) involve the sharing of electrons

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line