213 ppt 9 Quiz on Atoms and Molecules

What is the smallest part of any material called?

• Atom

• Molecule

• Proton

• Electron

What is an atom primarily composed of?

• Neutrons surrounded by protons

• Electrons surrounded by neutrons

• A central core containing protons surrounded by orbiting electrons

• Molecules surrounded by atoms

What charge do protons have?

• Negative

• Neutral

• Positive

• No charge

What charge do electrons have?

• Positive

• Neutral

• Negative

• No charge

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

• Neutrons

• Electrons

• Atoms

• Molecules

What is the simplest atom, consisting of one proton and one electron?

• Helium

• Uranium

• Hydrogen

• Oxygen

Which atom is described as the heaviest, with 92 protons balanced by 92 electrons?

• Helium

• Uranium

• Hydrogen

• Carbon

How many protons and electrons does a Helium atom have?

• One proton and one electron

• Two protons and two electrons

• Three protons and three electrons

• Four protons and four electrons

What is the charge of an electrically neutral atom?

• Positive

• Negative

• Neutral

• Variable

In a copper atom, how is the single electron in the outer orbit attached to the atom?

• Tightly

• Loosely

• Permanently

• Not attached