Question

1) Which kind of bond is present in a substance that conducts electricity only when it is melted or when it is dissolved in water?
a. Van Der Waals Forces
b. Metallic
c. Polar covalent
d. Ionic

2) Which element has luster, is ductile, and is malleable at room temperature?
a. Bromine
b. Palladium
c. Sulfur
d. Xenon

3) Which chloride compound shows the greatest covalent bond character?
a. AlCl3
b. LiCl
c. MgCl2
d. SCl2

4) What is the number of molecules in 4.4 g of carbon dioxide, CO2?
a. 6x10^24
b. 6x10^23
c. 6x10^22
d. 1x10^22

Explain answers?

Answer 1

What do you think for the first one?

Answer 2

Maybe C.?

Answer 3

C is always a polar molecule, no matter if it's solid or liquid it will conduct electricity

Answer 4

All right, the last 2 are optional so I don't have to do them.

Answer 5

So it is C?

Answer 6

The question wants "only" conducts electricity when on water

Answer 7

Hmm, alright. 1. is Ionic?

Answer 8

Yep electrons in ionic does not conduct electricity when solid, they conduct only when its liquid

Answer 9

Oh, I see. Would #2 be Palladium?

Answer 10

Good

Answer 11

Alright, that's all I had to do. Thanks so much ^_^