Unit 5&6 Test Review

Front

What makes a molecule polar?

Back

A molecule is polar when there are different types of elements bonded to the central atom, causing an unequal sharing of electrons.

Front

What is the molecular shape of BCl3?

Back

The molecular shape of BCl3 is trigonal planar.

Front

Which molecule has a linear shape?

Back

CO2 has a linear shape.

Front

Why is a bent molecular shape polar?

Back

A bent molecular shape is polar because there are lone pairs on the central atom, leading to an uneven distribution of charge.

Front

What is the correct Lewis structure for water?

Back

The correct Lewis structure for water is represented by option C.

Front

Define a trigonal planar molecular shape.

Back

A trigonal planar molecular shape occurs when a central atom is bonded to three other atoms, all in the same plane, with bond angles of 120 degrees.

Front

What is the significance of lone pairs in molecular geometry?

Back

Lone pairs can affect the shape of a molecule by repelling bonded pairs, leading to different molecular geometries.

Front

How does electronegativity affect molecular polarity?

Back

Electronegativity differences between bonded atoms can create dipoles, making the molecule polar if the dipoles do not cancel out.

Front

What is the VSEPR theory?

Back

VSEPR (Valence Shell Electron Pair Repulsion) theory predicts the shape of molecules based on the repulsion between electron pairs around a central atom.

Front

What is a nonpolar molecule?

Back

A nonpolar molecule has an even distribution of charge, often due to symmetrical shapes and equal electronegativity between bonded atoms.