Polar Covalent Nonpolar Covalent Ionic

A covalent bond is formed when two atoms

• share an electron with each other.

• share one or more pairs of electrons with each other.

• gain electrons.

• gain and lose electrons.

A polar covalent bond

• Has equal attraction of the electron pair between the bonded atoms

• Has unequal attraction of the electron pair between the bonded atoms

Tags

NGSS.HS-PS1-1

Use the table below to choose the pair of elements that will most likely have the least ionic character.

Element = Na

Electronegativity = 0.9

Element = O

Electronegativity = 3.5

Element = Cl

Electronegativity = 3.0

Element = H

Electronegativity = 2.1

• Na and Cl

• O and Cl

• H and O

• Na and O

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the dipole charge on the chlorine atom in the molecule HCl?

• +1

• -1

• δ+

• δ-

Atoms that are bonded with an electronegativity difference of 0 to 0.3 are generally considered to be

• negatively charged compounds.

• non-polar-covalent compounds.

• polar-covalent compounds.

• ionic compounds.

K = 0.2

Br = 2.8

N = 3.0

S = 2.5

choose the pair of elements that will most likely have the greatest ionic character.

• K and N

• K and S

• N and Br

• S and Br

Tags

NGSS.HS-PS1-3

1. Which of the following molecules is the most polar?

• H − Cl

• H − Br

• H − I

• H − F

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

2. Which of the following molecules is the least polar?

• H − N

• H − Si

• H − O

• H − C

Which of the following compounds is the most ionic?

• KF

• HF

• LiF4

• CF4

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following compounds is the most ionic?

• KF

• HF

• LiF4

• CF4

Tags

NGSS.HS-PS1-3