Formulae of compounds

What is the formula for a magnesium ion?

• Mg+

• Mg²⁺

• Mg^2-

• Mg^-

What is the name of this ion? SO₄^2-

• sulfur tetroxide ion

• sulfonate

• sulfate

• sulfide

What is the formula for lithium bromide?

• LiBr

• LiBr₂

• Li₂Br

• Li₂Br₂

What is the formula for iron(II) oxide?

• FeO₂

• FeO

• Fe₂O

• Fe₂O₃

Tags

NGSS.HS-PS1-2

K ⁺  and  N^-3

• KN
• KN₃
• K₃N₃
• K₃N

Tags

NGSS.MS-PS1-1

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

• KO.
• K₂O.
• K₂O₂.
• KO₂.

Tags

NGSS.MS-PS1-1

Which of the following represents an element?

• H₂O
• H₂
• NaCl
• CaCO₃

Which of the following an element?

• Carbonic Acid
• Copper
• Iron and Copper
• Water

How many elements are represented in the compound?
Na₂CO₃

• 1
• 2
• 3
• 4

Tags

NGSS.MS-PS1-1

How many atoms of carbon (C) are in C₆H₁₂O₆?

• 3
• 6
• 12
• 24

Tags

NGSS.MS-PS1-1