Science ( Atomic Theory )

What year was the Solid Sphere theory created?

1803

What year was the plum pudding model created?

1897

What year was the nuclear model or theory created?

1911

What year was the planetary model created?

1913

What year was the Quantum model created?

1920s

When was John Dalton born and when did he die?

1766 - 1844

What was John Dalton’s occupation?

He was a British chemist and physicist.

When did John dalton propose the Solid Sphere Model?

The early 19th century.

How did the Solid Sphere model describe atoms?

According to this theory, atoms are tiny balls that cant be broken and are all made of the same material.

What are the limitations of the Solid Sphere model?

• couldn’t explain the differences in atomic mass within an element.

• Didnt account for the presence of subatomic particles.

• Couldnt explain the behavior of atoms in chemical reactions.

When was J.J Thompson born and when did he die?

1856 - 1940

What was J.J Thompsons’s occupation?

He was an english physicist.

When did J.J Thompson propose the Plum Pudding model?

Late 19th century.

What did the Plum Pudding model propose?

According to this theory, atoms are like plum pudding, with tiny positive charges scattered through out a cloud of negative electrons.

What was Ernest Rutherford’s occupation?

He was a New Zealand born physicist .

What year did Ernest Rutherford propose the Nuclear model?

Early 20th century.

What was Neils Bohr’s occupation?

He was a Danish physicist known for his pioneering work in atomic structure.

When was Neils Bohr born and when did he die?

1885 - 1962

When did Neils Bohr propose the planetary model?

Early 20th century.

What did the planetary model propose?

It proposed that electrons orbit the nucleus of an atom in specific energy levels or shells.

When was Erwin Schrödinger born and when did he die?

1887 - 1961

What was Erwin Schrödinger’s occupation?

He was a Danish physicist renowned for his contribution to quantum mechanics.

When did Erwin Schrödinger propose the Quantum model?

1920s.

What did the Quantum model propose?

Electrons exist as a probable wave-like pattern around the nucleus, not in a specific orbit.