Physical Science Summative Test

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A type of molecule with unequal or asymmetrical distribution of electrons among the atoms of a molecule.

• polar

• nonpolar

• ionic

• covalent

It is the distribution of electric charges around atoms, chemical groups or molecules.

• electrons

• electronegativity

• polarity

• bond

Which of the following is not a noble gas?

• Neon

• Helium

• Oxygen

• Argon

A molecule has a central atom surrounded by four identical atoms. According to VSEPR theory, what is the most likely molecular geometry of this molecule?

• trigonal planar

• tetrahedral

• bent

• linear

What is the Molecular Geometry of a molecule with 3 bond pairs and 1 lone pair?

• Bent

• Tetrahedral

• Trigonal Planar

• Trigonal Pyramidal

A lone pair is defined as ____________.

• a pair of bonding electrons in the central atom

• one non-bonding electron

• electrons that do not participate in the chemical bond

• ability of an atom to attract electrons

How many valence electrons does SO3 have?

• 6

• 12

• 18

• 24

According to the octet rule, how many valence electrons do atoms need?

• 2

• 6

• 8

• 18

It is important to know the geometry of a molecule because the geometry ____________.

• A. Will give the Lewis structure of the molecule

• B. Affects the physical and chemical properties of the substance..

• C. Will determine whether the molecule is polar or nonpolar

• Both B and C