Atomic History

Front

What is the Plum Pudding Model?

Back

A model of the atom proposed by J.J. Thomson, suggesting that atoms are positive spheres with negative electrons embedded within them.

Front

What did Niels Bohr contribute to atomic theory?

Back

He created a model of the atom where electrons move around the nucleus in fixed orbits.

Front

What did Rutherford's experiment reveal about the nucleus of an atom?

Back

The nucleus is tiny, dense, and positively charged.

Front

What is Dalton's Atomic Theory?

Back

It states that all elements consist of atoms that cannot be divided.

Front

What is an atom?

Back

The smallest particle of an element that retains the chemical properties of that element.

Front

Who proposed the Solid Sphere Model of the atom?

Back

John Dalton proposed the Solid Sphere Model, which depicted atoms as indivisible spheres.

Front

What is the significance of the electron in atomic structure?

Back

Electrons are negatively charged particles that orbit the nucleus and are essential for chemical bonding.

Front

What did the discovery of the neutron contribute to atomic theory?

Back

The neutron, discovered by James Chadwick, explained the existence of isotopes and added to the understanding of atomic mass.

Front

What is the difference between an ion and an atom?

Back

An ion is an atom that has gained or lost electrons, resulting in a net charge, while an atom is neutral.

Front

What is the role of protons in an atom?

Back

Protons are positively charged particles found in the nucleus and determine the atomic number of an element.