Question

1. Identify the least electronegative atom.
a. P
b. Na
c. I
d. B
e. O

2. Give the number of nonbonding pairs of electrons in H2NOH.
a. 0
b. 1
c. 2
d. 3
e. 4

3. Ionic bonds form between
a. only elements in the same row of the periodic table
b. only elements in the same column of the periodic table
c. elements with significant differences in electronegativity
d. elements with similar electronegativity
e. two identical atoms

Answer 1

1. Identify the least electronegative atom.

the electronegative of the following atoms are as follows:
a. P    2.19
b. Na 0.93
c. I     2.66
d. B   2.04
e. O   3.44

Hence the least electronegative atom is Na which is metal and electropositive.

2. Give the number of nonbonding pairs of electrons in H2NOH.
a. 0
b. 1
c. 2
d. 3
e. 4

In Hydroxylamine there are 3 nonbonding pairs of electrons one on N atom and 2 on O –atom.

Hence the correct answer is d.

3. Ionic bonds form between
a. only elements in the same row of the periodic table
b. only elements in the same column of the periodic table
c. elements with significant differences in electronegativity
d. elements with similar electronegativity
e. two identical atoms

Ionic bond is also proper bond which is a result of attraction between cations and anions.

Hence the correct answer is C.