Advertisements
Advertisements
प्रश्न
‘Electrons revolve around the nucleus in fixed orbits or shells called energy levels’. State how these energy levels are represented.
Advertisements
उत्तर
- Electrons revolve around the nucleus in – fixed ‘orbits’ called energy levels
- The energy levels 1, 2, 3… are represented by – integer ‘n’ or as K, L, M, N…
- Electrons rotate around the nucleus, in one or more of the energy levels.
APPEARS IN
संबंधित प्रश्न
Draw the diagrams representing the atomic structures of the following: Nitrogen.
How does the existence of isotopes contradict Dalton’s atomic theory?
FILL IN THE BLANK
The protons and neutrons are held firmly in the nucleus by strong .........................
Tick the most appropriate answer.
Which of the following is used as a coolant in nuclear reactor?
- liquid sodium
- liquid nitrogen
- cadmium steel rods
- plutonium
WRITE SHORT ANSWER
What is the central part of an atom known as?
State one major drawback of Rutherford's model.
What are nucleons? How many nucleons are present in phosphorus? Draw its structure.
Name the following:
The element which does not contain any neutron in its nucleus.
Explain in brief – Lod Rutherford’s experiment which led to the discovery of the atomic nucleus.
Explain in brief the experimental proof which led to the discovery of –
Atomic nucleus
