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प्रश्न
Fill in the blank
The ..........................of an atom is very hard and dense.
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उत्तर
the nucleus of an atom is very hard and dense.
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संबंधित प्रश्न
How does the existence of isotopes contradict Dalton’s atomic theory?
Complete the table below by identifying A, B, C, D, E and F.
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
TRUE \ FALSE
Uranium-235 and uranium-238 both undergo nuclear fission.
WRITE SHORT ANSWER
What is the central part of an atom known as?
ANSWER IN DETAIL
How are radioactive radiations useful in medicines ?
State Dalton's atomic theory.
Explain in brief – Lod Rutherford’s experiment which led to the discovery of the atomic nucleus.
What is meant by the term nucleus
