oxidation and reduction

(a)   is the gain of oxygen atoms.

Tags

NGSS.HS-PS1-2

(a)   is the loss of oxygen atoms.

Is this an oxidation or reduction reaction?

water → hydrogen + oxygen

• Oxidation

• Reduction

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-1

Which element has been reduced?

iron oxide + lithium → iron + lithium oxide

• iron

• lithium

• oxide

• iron oxide

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-1

Which statement is true:
Mg → Mg²⁺ + 2e^–

• Mg gains 2 electrons
• Mg_²⁺ loses 2 electrons
• Mg loses 1 electron
• Mg loses 2 electrons

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-1

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

• Increased

• Decreased

• Remained Constant

• Varies Randomly

Tags

NGSS.HS-PS1-2

What substance is oxidized in the following reaction?
4Fe + 3O₂ --> 2Fe₂O₃

• Iron
• Fluorine
• Oxygen

Tags

NGSS.HS-PS1-2

Cl₂ + 2e- --> 2Cl ^- is an example of:

• a chemical reaction

• redox

• oxidation

• reduction

Substance that oxidizes another substance by accepting its electrons.

• reducing agent

• oxidation number

• combustion

• oxidizing agent

Substance that reduces another substance by losing electrons.

• reducing agent

• half-reaction

• electronegative atom

• oxidizing agent