Question 1

Which of the following elements is the most electronegative among the alkaline earth metals?

Accepted Answer

Mg

Question 2

Electronegativity generally ________ as you move from left to right across a period and ________ as you move down a group in the periodic table.

Accepted Answer

increases; decreases

Question 3

Which of the following pairs of elements has the greatest difference in electronegativity?

Accepted Answer

Na and F

Question 4

Calculate the difference in electronegativity between carbon ($$EN = 2.55) $$and fluorine ($$EN = 3.98).$$

Accepted Answer

$$1.43$$

Question 5

Which of the following molecules has the most polar bond?

Accepted Answer

S-F

Question 6

What type of chemical bond is present between two bromine atoms?

Accepted Answer

Pure Covalent

Question 7

Arrange the following elements in order of decreasing electronegativity: P, Na, N, Al.

Accepted Answer

N \u003e P \u003e Al \u003e Na

Question 8

Which of the following correctly identifies the chemical bond between a carbon and oxygen atom?

Accepted Answer

Polar Covalent

Question 9

A dipole moment is present in a bond when:

Accepted Answer

There is a significant difference in electronegativity between the atoms

Question 10

Which of the following best describes the bond in H-F?

Accepted Answer

Polar Covalent

Question 11

If the electronegativity difference between two atoms is $$0.0$$, what type of bond will they form?

Accepted Answer

Pure Covalent

Question 12

Which of the following statements about electronegativity is TRUE?

Accepted Answer

Electronegativity increases across a period

Question 13

Which element is the most electronegative in the periodic table?

Accepted Answer

Fluorine

Question 14

A bond between sodium and chlorine is best described as:

Accepted Answer

Ionic

Question 15

Which of the following molecules will have the largest dipole moment?

Accepted Answer

H-F

Question 16

If the electronegativity difference between two atoms is $$2.1$$, what type of bond is most likely formed?

Accepted Answer

Ionic

Question 17

Which of the following pairs of atoms will form a nonpolar covalent bond?

Accepted Answer

Br and Br

Question 18

Which of the following is a real-world example of a polar covalent bond?

Accepted Answer

The bond in $$H_2O$$

Question 19

Which of the following statements best explains why water ($$H_2O) is a $$polar molecule?

Accepted Answer

Oxygen is much more electronegative than hydrogen, creating a dipole

Question 20

Which of the following bonds would you expect to be the least polar?

Accepted Answer

Br-Br

Electronegativity, Dipole Moment, and Chemical Bond Classification

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