Atoms and Molecules

What are the three main subatomic particles?

• Protons, neutrons, and electrons.

• Protons, electrons, and positrons.

• Neutrons, electrons, and muons.

• Protons, neutrinos, and photons.

What is the charge of an electron?

• Positive charge.

• Neutral charge.

• Negative charge.

• Variable charge.

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What is an atom?

• The basic unit of a chemical element.

• A type of molecule that contains two or more atoms.

• A particle that is smaller than a molecule.

• A form of energy that can be converted into matter.

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What is the difference between an atom and a molecule?

• An atom is a single unit, while a molecule is made up of two or more atoms.

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

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

• Molecules can exist independently, while atoms cannot.

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NGSS.MS-PS1-1

What is the charge of a neutron?

• Positive charge

• Negative charge

• No charge

• Neutral charge

What is the nucleus of an atom?

• The outer shell of an atom, containing electrons.

• The central part of an atom, containing protons and neutrons.

• A type of subatomic particle found in the atom.

• The energy level of an atom.

What is the role of electrons in an atom?

• Electrons are involved in chemical bonding and reactions.

• Electrons are responsible for the mass of the atom.

• Electrons determine the color of the atom.

• Electrons are found in the nucleus of the atom.

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What determines the chemical properties of an element?

• The number of neutrons in an atom.

• The number of protons and electrons in an atom.

• The atomic mass of the element.

• The arrangement of electrons in the outer shell.

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 an electron.

What subatomic particle has a positive charge?

• Neutron

• Proton

• Electron

• Positron