3.01 Atomic Theory (BrainPop "Atomic Model")

Front

What are neutrons?

Back

Neutrons are subatomic particles found in the nucleus of an atom that have no electrical charge.

Front

How do neutrons differ from protons and electrons?

Back

Neutrons have no electrical charge, while protons are positively charged and electrons are negatively charged.

Front

Who was John Dalton?

Back

John Dalton was an early scientist who proposed the atomic theory, suggesting that matter is made up of atoms.

Front

Who was J.J. Thomson?

Back

J.J. Thomson discovered the electron and proposed the 'plum pudding' model of the atom.

Front

Who was Ernest Rutherford?

Back

Ernest Rutherford is known for discovering the nucleus of the atom and that atoms are mostly empty space.

Front

What does the nucleus of an atom contain?

Back

The nucleus contains protons and neutrons.

Front

What is the charge of a neutron?

Back

Neutrons have no electrical charge.

Front

What did Rutherford's gold foil experiment demonstrate?

Back

It demonstrated that atoms are mostly empty space and have a dense nucleus.

Front

What is the atomic model?

Back

The atomic model is a scientific representation of the structure of an atom, which has evolved over time with new discoveries.

Front

Why do scientists update the atomic model?

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Scientists update the atomic model because new information about atoms continues to be discovered.