Atomic Theory

Front

What is the Plum Pudding model of the atom?

Back

The Plum Pudding model, proposed by J.J. Thomson, suggests that the atom is a sphere of positive charge with negatively charged electrons embedded within it, resembling a 'plum pudding'.

Front

Who is known for developing the first atomic theory with four main postulates?

Back

John Dalton is known for developing the first atomic theory, which includes four main postulates about the nature of atoms.

Front

What significant discovery did James Chadwick make regarding atomic structure?

Back

James Chadwick discovered the neutron, a subatomic particle with no charge, which is located in the nucleus of the atom.

Front

What experiment did Ernest Rutherford conduct to discover the proton?

Back

Ernest Rutherford conducted the Gold Foil Experiment, which led to the discovery of the proton and the understanding of the atomic nucleus.

Front

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

Back

An electron has a negative charge and is located outside the nucleus of the atom.

Front

What are the three main subatomic particles in an atom?

Back

The three main subatomic particles are protons (positive charge), neutrons (no charge), and electrons (negative charge).

Front

What is the significance of the Gold Foil Experiment in atomic theory?

Back

The Gold Foil Experiment demonstrated that atoms have a small, dense nucleus, leading to the discovery of the proton and the understanding of atomic structure.

Front

What is the mass of a neutron compared to a proton?

Back

A neutron has a mass approximately equal to that of a proton, but it is slightly heavier.

Front

How did John Dalton's atomic theory change the understanding of matter?

Back

John Dalton's atomic theory established that matter is composed of indivisible atoms, which can combine in fixed ratios to form compounds.

Front

What is the role of electrons in chemical bonding?

Back

Electrons, particularly the valence electrons, play a crucial role in chemical bonding by being involved in the formation of bonds between atoms.