History of the atom

Front

What is a particle with one positive charge called?

Back

Proton

Front

Which scientist discovered the electron?

Back

J.J. Thomson

Front

Who proposed the 'solar system' model of the atom?

Back

Niels Bohr

Front

What is the correct order of scientific contributions to atomic theory?

Back

Democritus, Dalton, Thomson, Rutherford, Bohr, Chadwick

Front

Who developed the Quantum Mechanical Model of the atom?

Back

Erwin Schrödinger

Front

What is the basic unit of matter?

Back

Atom

Front

What did Democritus contribute to atomic theory?

Back

He proposed that matter is made up of indivisible particles called atoms.

Front

What is Dalton's Atomic Theory?

Back

It states that all matter is made of atoms, atoms of a given element are identical, and compounds are formed by combining different atoms.

Front

What did Rutherford's gold foil experiment demonstrate?

Back

It demonstrated that atoms have a small, dense nucleus that is positively charged.

Front

What is the significance of the electron in atomic structure?

Back

Electrons are negatively charged particles that orbit the nucleus and are involved in chemical bonding.