PS: Unit 3 review

What do the dots on Lewis Structures represent?

• atomic number

• isotopes

• valence electrons

• structure of the nucleus

Which of the following elements is the most stable and nonreactive?

• Carbon

• Neon

• Potassium

• Iron

Which of the following elements is least likely to form an ionic bond with sodium?

• Sulfur

• Chlorine

• Argon

• Phosphorus

A chemical bond that occurs when the atoms share electrons is a(n) ________ bond.

• covalent

• ionic

• polyatomic

• magnetic

Which of the following shows a correct chemical formula for the ionic compound Calcium fluoride?

• Ca2F3

• CaF

• CaF2

• CaF3

What is the name of the ionic compound made up of lithium and chlorine?

• Chloride lithium

• Lithium chloride

• Lithium Dichlorine

The correct way to represent sulfur as an ion is ________.

• S6-

• S%-

• S2-

• S2+

To become stable, sodium (Na) will ______ electrons and become a ______ ion.

• lose, negative

• lose, positive

• gain, negative

• gain, positive

What kind of chemical bond is formed when electrons are transferred from one atom to the other?

• covalent

• ionic

• magnetic

• hydrate

For the ionic compound NaCl, after Chlorine takes Sodium’s valence electron, why do the two atoms stay bonded together?

• Both atoms now have a positive charge, and like charges attract one another.

• Both atoms now have a negative charge, and like charges attract one another.

• Sodium is now a positive ion while Chlorine has become negative, due to their opposite charges they attract one another.

• Both atoms remain neutral in charge and share the electron.