Atomic Theory

Front

What was John Dalton's contribution to the atomic theory?

Back

John Dalton contributed to the atomic theory by proposing that matter is composed of indivisible atoms.

Front

What was JJ Thompson's contribution to the atomic theory?

Back

JJ Thompson contributed to atomic theory by discovering the electron and proposing the plum pudding model.

Front

Ernest __________ was the scientist who discovered the nucleus.

Back

Rutherford

Front

Which experiment was Ernest Rutherford known for?

Back

Gold foil experiment

Front

What was James Chadwick's contribution to the atomic theory?

Back

James Chadwick discovered that the neutron has a neutral charge.

Front

What was Neils Bohr's contribution to the atomic theory?

Back

Concluded that electrons are located in planet-like orbits around the nucleus in certain energy levels.

Front

What was concluded in the modern atomic theory?

Back

Electrons do not orbit the nucleus in neat planet-like orbits but move at high speeds in an electron cloud around the nucleus.

Front

Since atoms are too small to see, we need a scientific tool known as a __________.

Back

microscope