Electrons and Crystals (Week 2 2021-2022)

The part of matter ultimately responsible for every chemical reaction in the past, present, or future is...

• the electrons

• the protons

• the neutrons

• the quarks

Which is a more accurate atomic model?

• Electrons orbit around the nucleus like planets orbit Sun.

• Electrons exist simultaneously inside and outside the nucleus in complex 'cloud' shapes.

• Electrons are like blueberries stuck in a positively charged muffin.

• There is nothing smaller than atoms.

Choose the most accurate description.

• Electrons carry negative charge like you carry a pencil.

• Electrons are negative charges.

• Electrons can be positively or negatively charged, depending on the reaction.

• Electrons are much larger than positive charges.

Where does charge come from?

• No one knows, its a contemporary research topic.

• Chemical reactions create charge.

• Chemical reactions destroy charge, and new ones take their place.

• Charge is inversely proportional to the force matter experiences in an electromagnetic field.

What is matter?

• Energy.

• The part of the physical universe not made of ions.

• The part of the physical universe not made of atoms.

• Every. Material. Thing.

What is sodium chloride?

• table salt

• bleach

• aspirin

• secret ingredient of taco bell packets

What's the difference between electric current and an electric circuit?

• During chemical reactions, circuits become currents.

• During chemical reactions, currents become circuits.

• Circuits are the flow of e-, currents are the path circuits take.

• Current is a flow of e-, circuits are the path current takes.

An electrolyte is something that conducts electricity when dissolved in water, but not when melted.

• True

• False

If an atom gains an electron...

• its charge increases

• its charge decreases

When an atom gains or loses charge, its no longer called an atom. Instead its called a...

• semiconductor

• double displacement reaction

• ion

• polymer