Module #9: Polyatomic Ions and Molecular Geometry

Question 1

Polyatomic Ions

Answer 1

Ions which are formed when a group of atoms gains or loses electrons

Question 2

VSEPR Theory

Answer 2

Valence Shell Electron Pair Repulsion

Question 3

What is the angle measure for the Tetrahedron molecule?

Answer 3

Tetrahedron - 109°

Question 4

What is the angle measure for the Pyramidal molecule?

Answer 4

Pyramidal - 107°

Question 5

What is the angle measure for the Bent molecule?

Answer 5

Bent (H~2O) - 105°

Question 6

What is the angle measure for the Trigonal molecule?

Answer 6

Trigonal - 120°

Question 7

What is the angle measure for the Linear molecule?

Answer 7

Linear - 180°

Question 8

How many valence electrons does Boron strive for?

Answer 8

Boron strives for six [6] valence elctrons instead of [8]

Question 9

Polar covalent compounds can dissolve other ____ compounds?

Answer 9

Polar covalent compounds can dissolve other polar covalent compounds and ionic compounds.
This is because both types of compounds contain electrical charges.

Question 10

Purely covalent compounds, on the other hand, can only dissolve other ____ compounds?

Answer 10

Purely covalent compounds, on the other hand, can only dissolve other purely covalent compounds, because no electrical charges are present.