PMS Pedagogy

28/05/2024

Idioms
Part2

28/05/2024

Idioms

17/11/2023

Important books and their authors

16/11/2023

The Noble Prize in chemistry 2023

16/11/2023

16/11/2023

THE SAVE METHOD

13/09/2023

Give it a read!

17/07/2023

Hydrogen can prove to be a missing link to a climate-safe, sustainable and affordable energy future.

17/07/2023

Did you know?
The world's longest train is the SWISS TRAIN with 2 km length, 100 coaches, 4550 seats and 7 drivers and passes through the Swiss Alps.

12/05/2023

Update regarding Pms(punjab )_2022 postponement that was scheduled to commence from 16_05_2023
.....

06/04/2023

05/04/2023

’s groundbreaking paper proposing a new atomic model, 'On the constitution of atoms and molecules', is dated 5 April 1913.

The discoveries of the electron and radioactivity at the end of the 19th century led to different models for the structure of the atom.
In 1913, Niels Bohr proposed a theory for the hydrogen atom based on quantum theory which stated that:
●Energy is transferred only in certain well-defined quantities.
●Electrons should move around the nucleus but only in prescribed orbits. ●When jumping from one orbit to another with lower energy, a light quantum is emitted.
Bohr's theory could explain why atoms emitted light in fixed wavelengths.

■He was awarded the Nobel Prize in Physics in 1922.