Atoms and Molecules

What is the mass of a proton compared to an electron?

• A proton is much heavier than an electron.

• A proton is lighter than an electron.

• A proton and an electron have the same mass.

• A proton is slightly heavier than a neutron.

What is a chemical element?

• A substance that cannot be broken down into simpler substances by chemical means.

• A mixture of two or more substances.

• A compound formed by chemical reactions.

• A type of molecule that can exist in different states.

Where are electrons located in an atom?

• In the nucleus of the atom.

• In the outer shell or orbital.

• In the protons of the atom.

• In the inner shell or core.

How many atoms make up a molecule?

• 1 atom

• 2 or more atoms

• 3 atoms

• 5 atoms

What is the charge of a neutron?

• Positive charge

• Negative charge

• No charge

• Neutral charge

What is the difference between an atom and a molecule?

• An atom is a single unit, while a molecule is a group of two or more atoms bonded together.

• An atom is a group of two or more molecules, while a molecule is a single unit.

• Atoms are larger than molecules, which are smaller units of matter.

• Molecules are made up of protons, while atoms are made up of electrons.

What do protons and neutrons form in an atom?

• The electron cloud.

• The nucleus.

• The atomic shell.

• The isotopes.

What are the three main subatomic particles?

• Electrons, protons, and neutrons.

• Electrons, positrons, and neutrinos.

• Protons, neutrons, and photons.

• Neutrons, muons, and quarks.

What is the charge of a proton?

• Negative charge

• Neutral charge

• Positive charge

• Variable charge

What is the charge of an electron?

• Positive charge.

• Neutral charge.

• Negative charge.

• Variable charge.