Day 3: Physical Science Final Exam Review

How do elements combine to form molecules (covalent bonds)?

• share electrons
• gain electrons
• lose electrons
• All of the choices are correct.

What causes an atom to have a positive charge?

• Protons are removed.
• Protons are added.
• Electrons are removed.
• Electrons are added.

A ___ bond is between two nonmetals.

• metallic
• ionic
• covalent

A ___ bond is between a nonmetal and a metal.

• metallic
• ionic
• covalent

Atoms with full outermost s and p orbitals are ___ stable than atoms with only partly filled outer s and p orbitals.

• more
• less
• the same

The net charge on an element after it transfers electrons to follow the octet rule is called ___.

• ionic charge
• oxidation number
• atomic number
• valence charge

The octet rule is a basic guideline that states that every atom in a compound wants how many electrons to be happy?

• 2
• 6
• 4
• 8

The oxidation number for halogens is:

• +1
• 2+
• 1-
• 2-

The diagram that best represents the Lewis dot diagram of a chlorine atom is:

• A
• B
• C
• D

How many atoms of aluminum (Al), sulfur (S), and oxygen (O) are in each molecule of Al2(SO4)3?

• 2-aluminum, 1-sulfur, 4-oxygen
• 1-aluminum, 3-sulfur, 4-oxygen
• 2-aluminum, 3-sulfur, 3-oxygen
• 2-aluminum, 3-sulfur, 12-oxygen