Atomic Models Q2

According to Brittanica, it is the smallest unit into which matter can be divided without the release of electrically charged particles.

Atom

It has three subatomic particles: protons, neutrons, and electrons.

Atom

These are theoretical representations that describe the structure and behavior of atoms, which are the fundamental building blocks of matter.

Atomic models

DALTON’S MODEL, THOMSON’S MODEL, RUTHERFORD’S MODEL, BOHR’S MODEL, SCHRODINGER’S MODEL.

DIFFERENT KINDS OF ATOMIC MODELS

He is an English chemist and physicist, formally proposed an atomic model in 1808 as a solid sphere to understand the composition of matter.

John Dalton

following postulates of his model include: 

• All matter is composed of particles called atoms that are indivisible.

• It cannot be created nor destroyed.

• Specific elements generally have only one type of atom present in them.

• Compounds are formed from the combination of two or more atoms.

JOHN DALTON’S ATOMIC MODEL (1808)

• Because Dalton’s model did not introduce subatomic particles, _________ introduced his plum pudding model in 1904.

J.J. Thomson

Additionally, _______ held that atoms are uniform spheres of positively-charged matter in which electrons are embedded.

J. J. Thomson

He won a Nobel Prize for discovering electrons through his Cathode Ray experiment.

J. J. Thomson

In 1911, physicist ________ introduced his nuclear model of the atom.

Ernest Rutherford

It describes the atom as having a small, dense, positively charged nucleus at the center, with electrons orbiting it.

ERNEST RUTHERFORD’S ATOMIC MODEL (1911)

It laid the foundation for the modern atomic theory through ________’s Alpha Ray Scattering Experiment.

ERNEST RUTHERFORD’S ATOMIC MODEL (1911)

In 1913, __________ modified Rutherford’s model through his planetary model of the atom.

Niels Bohr

The model features the nucleus that represent the sun, while the electrons are the planets orbiting around the nucleus.

NIELS BOHR’S ATOMIC MODEL (1913)

It was the first to incorporate quantum mechanics, suggesting that electrons can travel to higher levels by absorbing high energy and vice versa.

NIELS BOHR’S ATOMIC MODEL (1913)

In 1926, __________ introduced his quantum model of the atom.

Erwin Schrödinger

It states that electrons do not move around the nucleus as fixed orbits, but in waves allowing them to be found in orbitals around the nucleus.

ERWIN SCHRODINGER’S ATOMIC MODEL (1926)

The model laid the groundwork for modern quantum mechanics.

ERWIN SCHRODINGER’S ATOMIC MODEL (1926)