Understanding Atomic Structure and Theory

What are atoms considered to be?

• The largest units of matter

• The building blocks of everything in the universe

• Only found in liquids

• Visible to the naked eye

Which states of matter are composed of atoms?

• Only solids

• Only liquids and gases

• Solid, liquid, and gas

• Only plasma

Which ancient Indian scientist, sage, and philosopher proposed the idea of indivisible matter called "Anu"?

• Democritus

• Aristotle

• Maharshi Kanada

• Plato

Who was the Greek philosopher credited with proposing the first atomic theory, explaining that everything is made of tiny particles called "atomos"?

• Maharshi Kanada

• Aristotle

• Democritus

• Socrates

What are the negatively charged particles found on the outer side of an atom?

• Protons

• Neutrons

• Electrons

• Nucleus

What particles make up the nucleus of an atom?

• Electrons and protons

• Neutrons and electrons

• Protons and neutrons

• Only protons

How does modern science view the traditional atomic model often taught in textbooks?

• As perfectly accurate

• As a complete representation

• As inaccurate and misleading

• As the only valid model

In the modern understanding of an atom, where are electrons found?

• Orbiting the nucleus in fixed paths

• Within the nucleus

• In an unpredictable region called the electron cloud

• Outside the atom entirely

Approximately what percentage of an atom is empty space?

• 50%

• 75%

• 90%

• 99.9999999%