Writing Formulas

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

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

• Its name ends in

  -ate or -ite

• Its name has roman numerals

• Its name ends in -ide

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

Ca⁺², O^-2

• CaO

• OCa

• Ca_-2O₊₂

• Ca₂O₂

Tags

NGSS.MS-PS1-1

K⁺, O^-2

• KO

• K₂O

• K_-2O₂

• O₂K

Tags

NGSS.MS-PS1-1

What is the correct formula for phosphorous trichloride?

• P₃Cl

• PCl₃

• KCl₃

• K₃Cl

Tags

NGSS.MS-PS1-1

What is the compound formula for the ions Zn⁺² and S^-2 ?

• ZnS

• Zn₂S₂

• zinc sulfide

Tags

NGSS.MS-PS1-1

What is the compound formula for the ions Na⁺ and Cl^-?

• Na₂Cl₄

• NaCl

• sodium chloride

Tags

NGSS.MS-PS1-1

Which of the following formulas represents the harmful gas, carbon monoxide?

• CO

• CO₂

• NO

• SO₂

Ca⁺²P^-3

• PCa

• P₂Ca₃

• CaP

• Ca₃P₂

Tags

NGSS.MS-PS1-1

What is the compound formula for the ions Fe+3 and O-2 ?

• iron oxide

• FeO

• Fe₂O₃

Tags

NGSS.MS-PS1-1

Which of the following is the correct chemical formula for aluminum oxide?

Tags

NGSS.MS-PS1-1