railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) General Science Physics Laws and Principles
‘When elements are arranged in the order of increasing atomic masses, the atomic mass of the middle element is roughly the average of the atomic masses of the other two elements’. This law is known as ________.
1
Dobereiner’s law of traids
2
Mendeleev’s law
3
Newlands law of octaves
4
Newton’s law