REDOX introduction

What is the role of electrons in chemistry?

• To form molecules

• To transfer between atoms

• To bond atoms together

• To create energy

What is the main focus of redox reactions?

• Sharing neutrons

• Creating covalent bonds

• Gaining or losing electrons

• Swapping protons

What is the oxidation state of an atom in a neutral compound?

• +2

• -1

• 0

• +1

What is the oxidation number of oxygen in most cases?

• -2

• +1

• -1

• +2

What happens to an atom during reduction in a redox reaction?

• It shares protons

• It forms covalent bonds

• It gains electrons

• It loses electrons

What is the oxidation state of hydrogen in compounds?

• 0

• +1

• +2

• -1

What is the key concept to remember in redox reactions?

• OILRIG - Oxidation is loss of electrons, reduction is gain of electrons

• Redox reactions involve only protons

• Oxygen is the most important element

• Electronation and de-electronation

What is the purpose of assigning oxidation numbers to atoms in a reaction?

• To identify the boiling point

• To determine the color of the compound

• To track the movement of electrons

• To calculate the mass of the atoms

What is the oxidation state of an element by itself?

• 0

• +1

• +2

• -1

What is the final step in balancing a redox equation?

• Combining the half-reactions

• Writing the half-reactions

• Determining the reaction products

• Assigning oxidation states