Which of the following bond(s) is/are polar covalent?
Si and P
C and N
Ca and Br
Na and O

Question

Which of the following bond(s) is/are polar covalent?
   Si and P 
   C and N 
   Ca and Br 
   Na and O

anonymous · Answer

All of them are polar covalent

anonymous · Answer

Silicon-Phosphorus, Na-O, and and Ca-Br are ionic, @Sheng

anonymous · Answer

C and N has to be polar covalent.  Both atoms are strongly electronegative, but N is only slightly more so, resulting in a slight negative charge towards N.

anonymous · Answer

oh sorry only saw the polar part, Si-P and C-N are polar covalent

anonymous · Answer

Is silicon not a metal?  I thought metal-nonmetal bonds are all ionic...

anonymous · Answer

i thought only metals and nonmetals are polar

anonymous · Answer

silicon is a metalloid

anonymous · Answer

polar is anything that has an electronegativity difference

anonymous · Answer

doesnt matter if it's metal or non-metal, that's only generally speaking