Models of the Atom

Front

What is the 'solid sphere model' of the atom?

Back

The 'solid sphere model' is a concept proposed by John Dalton, suggesting that atoms are indivisible and solid spheres that make up all matter.

Front

What term did Democritus coin for a tiny piece of matter that cannot be divided?

Back

The term 'Atom'.

Front

Who proposed the first modern atomic theory?

Back

John Dalton proposed the first modern atomic theory.

Front

What is the charge and location of protons in an atom?

Back

Protons have a positive charge and are located in the nucleus of an atom.

Front

What device did J.J. Thomson use to discover the electron?

Back

J.J. Thomson used a cathode ray tube to discover the electron.

Front

What is the main difference between Dalton's model and Rutherford's model of the atom?

Back

Dalton's model describes the atom as a solid sphere, while Rutherford's model introduces a nucleus and suggests that atoms are mostly empty space.

Front

What are neutrons and where are they found?

Back

Neutrons are neutral particles found in the nucleus of an atom, alongside protons.

Front

What is the charge of an electron and where is it located?

Back

Electrons have a negative charge and are located in the electron cloud surrounding the nucleus.

Front

What did Rutherford's gold foil experiment demonstrate?

Back

Rutherford's gold foil experiment demonstrated that atoms have a small, dense nucleus and are mostly empty space.

Front

What is the significance of the Bohr model of the atom?

Back

The Bohr model introduced the idea of quantized energy levels for electrons, explaining how they orbit the nucleus.