C&G 2365 202-01 Electron Theory

What is the smallest part of any material called?

• Atom

• Molecule

• Proton

• Electron

What is the central core of an atom composed of?

• Electrons

• Neutrons

• Protons

• Molecules

What charge do protons have?

• Negative

• Neutral

• Positive

• No charge

In an electrically neutral atom, the number of protons is equal to the number of what?

• Neutrons

• Electrons

• Molecules

• Atoms

What is the simplest atom?

• Helium

• Uranium

• Hydrogen

• Oxygen

Which of these atoms is the heaviest?

• Helium

• Uranium

• Hydrogen

• Carbon

How many protons and electrons does a helium atom have?

• 1 proton and 1 electron

• 2 protons and 2 electrons

• 92 protons and 92 electrons

• 3 protons and 3 electrons

How many protons are present in a copper atom?

• 29

• 28

• 30

• 31

What makes an atom electrically neutral?

• Equal number of protons and electrons

• More protons than electrons

• More electrons than protons

• No protons or electrons

What is the charge of a proton?

• Positive

• Negative

• Neutral

• Variable