Atomic Models Review (Principles)

Front

What was the conclusion of Rutherford's Gold Foil Experiment regarding the structure of the atom?

Back

The atom is mostly empty space, with a small, dense, positively charged nucleus.

Front

What subatomic particle did J.J. Thomson discover, and what experiment did he use?

Back

Thomson discovered the electron using a Cathode Ray Tube.

Front

Where are electrons with the least energy located in an atom?

Back

Electrons with the least energy are located in the 1st energy level.

Front

What happens to electrons when they release energy?

Back

They move from higher to lower energy levels, creating a bright-line spectrum.

Front

What is the charge of an electron?

Back

The electron has a negative charge.

Front

What is the nucleus of an atom composed of?

Back

The nucleus is composed of protons and neutrons.

Front

What did the gold foil experiment reveal about the nucleus?

Back

The nucleus is small and dense compared to the overall size of the atom.

Front

What is the significance of the bright-line spectrum in atomic theory?

Back

It provides evidence for quantized energy levels in atoms.

Front

What is the mass of an electron compared to a proton?

Back

The mass of an electron is much smaller than that of a proton.

Front

What is the principle behind the Cathode Ray Tube experiment?

Back

It demonstrates the existence of electrons and their negative charge.