Atomic Structure CP

Front

Who discovered the electron?

Back

JJ Thompson is credited with the discovery of the electron in 1897 through his experiments with cathode rays.

Front

What is the Cathode Ray Tube experiment?

Back

The Cathode Ray Tube experiment, conducted by JJ Thompson, demonstrated that cathode rays are streams of negatively charged particles (electrons).

Front

What was the outcome of the Gold Foil Experiment?

Back

In the Gold Foil Experiment, most alpha particles passed straight through the gold foil, indicating that atoms are mostly empty space.

Front

How many protons are in an atom of magnesium?

Back

An atom of magnesium has 12 protons.

Front

Did Democritus have any experimental evidence about the atom?

Back

No, Democritus did not have experimental evidence; his ideas were based on philosophical reasoning.

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element.

Front

What are protons?

Back

Protons are positively charged subatomic particles found in the nucleus of an atom.

Front

What are neutrons?

Back

Neutrons are neutral subatomic particles found in the nucleus of an atom, contributing to its mass.

Front

What are electrons?

Back

Electrons are negatively charged subatomic particles that orbit the nucleus of an atom.

Front

What is the nucleus of an atom?

Back

The nucleus is the central part of an atom, containing protons and neutrons.