Atomic Theory Quiz

Who is considered as the first person to propose the idea of atoms?

• Ernest Rutherford

• John Dalton

• Democritus

• Aristotle

What did Democritus believe was the smallest possible piece of matter?

• Proton

• Atom

• Molecule

• Electron

Which scientist proposed the first atomic theory after a 2000-year gap?

• John Dalton

• J.J. Thompson

• Ernest Rutherford

• Niels Bohr

Who discovered the presence of a negative particle in the atom, known as the electron?

• John Dalton

• Goldstein

• Ernest Rutherford

• J.J. Thompson

What did J.J. Thompson's atomic model compare atoms to?

• Both A and B

• Raisins in a pudding

• None of the above

• Chocolate chips in a cookie

Who proposed the concept of a small dense positively charged center in the atom, known as the nucleus?

• Erwin Schrodinger

• John Dalton

• Ernest Rutherford

• Niels Bohr

What did Niels Bohr propose about the arrangement of electrons in an atom?

• They are stationary

• They move in definite orbits

• They are located in the nucleus

• They move randomly

Who discovered the third subatomic particle in the atom, known as the neutron?

• Niels Bohr

• J.J. Thompson

• Ernest Rutherford

• James Chadwick

What did Erwin Schrodinger use to describe the odds of finding the location of an electron?

• Chemical formula

• Physical model

• Biological process

• Mathematical equation

Why is the knowledge of atomic structure important?

• To understand the weather

• To study the human body

• To understand the properties of materials

• To explore outer space