Answer:
i can't understand your question haha
Polar covalent bonds are between atoms with different electronegativities, whereas nonpolar covalent bonds are between atoms with the same electronegativity.
This means that HCl is a polar covalent bond, whereas H2 is a nonpolar covalent bond.
All of them are pretty correct except the last one, can't really give you a definite answer sorry. <span />
I think u asked for the atoms of sulfur? its 4..
Explanation:
calcium = 4
sulfur = 4
oxygen = 4
I hope this is correct