2.2 Chemical Bonds

Question 1

How does electronegativity determine whether covalent bonds are polar or nonpolar? (2.2)

Answer 1

Electronegativity is the strength of the element in pulling e-. In polar bonds, electrons are not shared equally, whereas polar bonds do.

Question 2

Why do atoms in polar covalent bonds have partial charges? (2.2)

Answer 2

Unequal share in electrons result in both ends of the polar covalent bonds having partial charges.

Question 3

What do the symbols δ+ and δ- mean? (2.2)’

Answer 3

Partial positive and negative

Question 4

Be able to predict whether a covalent bond is polar or nonpolar (2.2)

Answer 4

O>N>S, C, H, P

Question 5

How is an ionic bond formed? (2.2)

Answer 5

When e- is completely transferred from one atom to another.

Question 6

What are van der Waal’s interactions and why do they form? (2.2)

Answer 6

Van der Waal’s interactions are very weak ones and they don’t last long. They form because the e- isn’t fixed in one position. Atom that is closest to spinning e- will briefly interact with the e-.

Question 7

What is the strongest type of chemical bond? What is the weakest? Do all covalent bonds have the same strength? (2.2)

Answer 7

Strongest is covalent bond, weakest is van der waal’s attraction. Not all covalent bonds have the same strength