Unit 2 Molecular and Ionic Compound Structure & Properties

What group of elements satisfies the octet rule without forming compounds?

• halogen
• noble gas
• alkali metal
• alkali earth metal

The ions in most ionic compounds are organized into a

• molecule.
• Lewis structure.
• polyatomic ion.
• crystal.

Tags

NGSS.HS-PS1-3

What do the subscripts represent in a chemical formula?

• atomic mass of each element.
• number of atoms or ions of each element that are combined in a compound.
• formula mass.
• charges on the elements or ions. 

What is the formula for calcium flouride?

• CaF
• Ca₂F
• CaF₂
• Ca₂F₂

What is the formula for the compound formed by sodium ions and chloride ions?

• NaCl₂
• Na₂Cl
• NaCl
• Na₂Cl2

Tags

NGSS.MS-PS1-1

What is the formula for the compound formed by lead(II) ions and dichromate ions?

• Pb₂Cr₂O₇
• PbCr₂O₇
• Pb₂(Cr₂O₇)₂
• Pb(Cr₂O₇)₂

What is the formula for calcium hydroxide?

• CaOH
• Ca₂OH
• Ca(OH)₂
• Ca(OH)^-2

Name the compound KClO₃

• potassium chloride

• potassium trioxychlorite

• potassium chlorate

• hypochlorate

Name the following compound Fe(OH)₂

• Iron hydroxide
• Iron (II) hydroxide
• Ferrous hydroxide
• Iron oxyhydrate

What is the sum of the atomic masses of all the atoms in the formula for a compound?

• molecular mass
• formula mass
• atomic mass
• actual mass