Question

question 21
1 pts
a bond where the electrons are shared unequally is called a(an) ______ bond.
nonpolar covalent
ionic
polar covalent
coordinate covalent

question 22
1 pts
select the pair of atoms that forms the most polar covalent bond:
c - n
n - o
o - f
si - cl

Explanation:

• For Question 21: In a polar covalent bond, electrons are shared unequally between atoms due to differences in electronegativity. Non - polar covalent bonds have equal electron sharing, ionic bonds involve electron transfer, and coordinate covalent bonds are a special type of covalent bond where one atom donates both electrons to the bond.
• For Question 22: The polarity of a covalent bond depends on the electronegativity difference between the two atoms. The greater the electronegativity difference, the more polar the bond. Looking at the electronegativity values of the elements in each pair, the Si - Cl pair has the largest electronegativity difference among the given options.

Answer:

Question 21: C. polar covalent
Question 22: D. Si - Cl