Writing Formulas

The chemical formula for an ionic compound of potassium and oxygen is

• KO.

• K₂O.

• K₂O₂.

• KO₂.

Tags

NGSS.MS-PS1-1

Hydrochloric acid, commercially known as muriatic acid, has the chemical formula ________.

• HCl

• HClO

• HClO₂

• HClO₃

Tags

NGSS.MS-PS1-1

Solid carbon dioxide, more commonly known as dry ice, has the chemical formula _______.

• CO

• CO₂

• CO₃

• CH₄

Tags

NGSS.MS-PS1-1

Tetraphosphorus trisulfide has the chemical formula ________.

• P₃S₄

• P₄S₃

• F₃S₄

• F₄S₃

Tags

NGSS.MS-PS1-1

How do the following two elements bond together?
Na¹⁺  F^1-         

• NaF

• NaF₃

• Na₃F

• Na₁F₂

Tags

NGSS.MS-PS1-1

When adding a subscript to a polyatomic ion, you should...

• multiply any subscripts on the polyatomic ion by the subscript you are adding

• put parentheses around the polyatomic ion before adding a subscript

• write the new subscript next to any subscripts on the polyatomic ion

• put the polyatomic ion in square brackets before adding the subscript

When writing chemical formulas, how do you know it is a polyatomic compound?

• The word acid is in its name

• Its name ends in

  -ate or -ite

• Its name has roman numerals

• Its name ends in

  -ide

When writing chemical formulas, how do you know it is a multivalent ionic compound?

• The word acid is in its name

• Its name ends in

  -ate or -ite

• Its name has roman numerals

• Its name ends in

  -ide

When writing chemical formulas, how do you know it is a molecular compound?

• The elements are on the left and right hand sides of the periodic table

• Its name ends in

  -ate or -ite

• The name contains prefixes

• Its name ends in -ide

• The elements are on the right hand side of the periodic table

What is the chemical formula for water?

Tags

NGSS.MS-PS1-1