Fall Final Review 2024

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What is the Octet Rule?

• All atoms want 2 valence electrons in their outer most energy level to become stable.
• All atoms want 8 valence electrons in their outer most energy level to become stable.
• All atoms want 2 valence electron in their outer most energy level, except hydrogen and helium who want 8.

Electrolytes are

• energy for the body to function properly
• ions that help with nerve signaling

An ion is an atom that has

• lost or gained electrons
• lost or gained protons
• lost or gained neutrons

What is the charge Ba tends to form to become stable?

• 1+ charge
• 2+ charge
• -1 charge
• -2 charge

Chemical reactions are the rearrangement of atoms into new bonds, where mass is neither created nor destroyed.

• True
• False

Activation energy is

• energy released from a reaction
• energy needed to start a reaction

Based on the chemical reaction below, how many molecules of Oxygen (O2) react with 1 molecule of Methane (CH4)? hint how many oxygen molecules do you need for one methane molecule?

• 4
• 8
• 6
• 2

Based on the chemical reaction below, how many molecules of Oxygen (O2) react with 3 molecules of Methane (CH4)? hint how many oxygen molecules do you need for one methane molecule?

• 4
• 8
• 6
• 2