Atoms and Molecules Quiz

What happens when you keep cutting a gold bar into smaller pieces?

• The gold bar becomes a liquid.

• The gold bar turns into graphite.

• You eventually reach a single particle of gold that cannot be divided further.

• The gold bar disappears completely.

What instrument is needed to view atoms?

• A magnifying glass

• A regular microscope

• An electron microscope

• A telescope

Who discovered the electron?

• Niels Bohr

• Albert Einstein

• Isaac Newton

• JJ Thompson

What are the smaller particles that make up an atom?

• Molecules

• Compounds

• Elements

• Protons, neutrons, and electrons

What is formed when two oxygen atoms combine?

• A carbon molecule

• A hydrogen molecule

• A water molecule

• An oxygen molecule

How are molecules formed?

• By splitting atoms

• By combining two or more atoms chemically

• By heating elements

• By freezing compounds

What is a molecule of water composed of?

• Two hydrogen atoms and two oxygen atoms

• Three hydrogen atoms

• One oxygen atom and two hydrogen atoms

• Two oxygen atoms and one hydrogen atom

What is the smallest unit of a compound?

• A neutron

• A molecule

• An atom

• A proton

What is the difference between molecules of elements and molecules of compounds?

• Molecules of elements are made of different types of atoms.

• Molecules of compounds are made of the same type of atoms.

• Molecules of compounds are made of only one type of atom.

• Molecules of elements are made of the same type of atoms, while molecules of compounds are made of different types of atoms.

What is the smallest unit of matter that is considered indivisible in this context?

• A molecule

• An atom

• A compound

• A cell