Criss-cross method

Is Iron (Fe) an element or a compound?

• Element
• Compound

Ba ⁺³ and  Cl^-

• Ba₃Cl
• Ba₃Cl₃
• BaCl₃
• BaCl

Tags

NGSS.MS-PS1-1

Fe ⁺³  and  S ^-2

• Fe₃S₂
• FeS
• S₃Fe₂
• Fe₂S₃

Tags

NGSS.MS-PS1-1

Ag ⁺  and  Br ^-

• AgBr
• BrAg
• Ag₂Br₂
• Br₂Ag₂

Tags

NGSS.MS-PS1-1

How do the following two elements bond together?

Sodium (2,8,1) and Fluorine (2,7)

• NaF

• NaF₃

• Na₃F

• Na₁F₂

Tags

NGSS.MS-PS1-1

How do the following two elements bond together?

Potassium (2,8,1) and Sulfur (2,8,6)

• KS

• K₈S

• K₆S₃

• K₂S

Tags

NGSS.MS-PS1-1

Magnesium bromide is an ionic compound with the chemical formula MgBr₂.  What does the "2" tell you?

• There are 2 bromide ions for every magnesium ion
• Bromide has a 2- charge
• Bromide has a 2+ charge
• There are 2 magnesium ions to every bromide ion

Tags

NGSS.MS-PS1-1

Na ⁺  and  S ^-2

• Na₂S
• NaS₂
• Na₂S₂
• NaS

Tags

NGSS.MS-PS1-1