3. which of the below have the highest electrical and the thermal conductivity?
a. metal spoons
b. glass spoons
c. plastic spoon
d. wooden spoon

4. why does covalent compounds do not conduct electricity?
a. they dont break up into ions
b. they don't dissolved in water
c. they have high melting points
d. they are crystalline​

5. which of the following compounds have a very low melting point
a. vetsin
b. salt
c. baking soda
d. sugar