Understanding Atoms and Elements

What is the primary reason we cannot see atoms with the naked eye?

• Atoms are too small to be seen without a microscope.

• Atoms are hidden inside other materials.

• Atoms are transparent and invisible.

• Atoms move too quickly to be observed.

Which particles are found in the nucleus of an atom?

• Neutrons and electrons

• Protons and neutrons

• Protons and electrons

• Electrons and protons

How is the atomic number of an element determined?

• By the number of electrons

• By the atomic mass

• By the number of protons

• By the number of neutrons

What is the difference between a molecule and a compound?

• A compound is always smaller than a molecule.

• A molecule is always larger than a compound.

• A compound is made of different elements, while a molecule can be made of the same element.

• A molecule is made of different elements, while a compound is not.

According to Dalton's Atomic Theory, what happens to atoms during chemical reactions?

• Atoms disappear.

• Atoms change into different atoms.

• Atoms split into smaller particles.

• Atoms form bonds to create compounds.