Oxidation numbers

What is the oxidation number of Fe in FeO?

• +1
• -1
• +2
• -2

Tags

NGSS.HS-PS1-2

What is the oxidation number of O in CO₂?

• +2
• -1
• +4
• -2

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the oxidation number of N in NO₂^1- ?

• -3
• +4
• -2
• +3

Tags

NGSS.HS-PS1-1

A chemical reaction that involves a gain/loss of electrons is called:

• Double Replacement
• Neutralization
• Oxidation-Reduction
• Hydrolysis

Tags

NGSS.HS-PS1-2

If in a reaction, copper is reduced; its number of electrons has:

• Increased
• Decreased
• Remained Constant
• Varies Randomly

Tags

NGSS.HS-PS1-2

If an atom loses electrons during a chemical reaction, the atom was:

• Oxidized
• Reduced
• Neutralized
• Precipitated

Tags

NGSS.HS-PS1-2

The sum of all oxidation numbers in a neutral compound is ___.

• 0
• 1
• -1
• depends on the compound

Which of the following compounds is NOT an ionic compound?

• NaCl
• NH₃
• Fe₂O₃
• HCl

Tags

NGSS.HS-PS1-3

What is the oxidation of C in CH₄?

• -4
• -1
• +4
• +1

Tags

NGSS.HS-PS1-2

What element's don't have oxidation numbers?

• alkali metals
• noble gases
• halogens
• alkaline earth metals