Which of the following is an element?
Ruby
Sapphire
Emerald
Diamond
Which of the following is an element?
Which of the following is used as a moderator in nuclear reactor? |
Answer |
Which among the following is a positively charged particle emitted by a radioactive element? |
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Atoms are composed of |
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In an atomic explosion, enormous energy is released which is due to |
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Isotopes are separated by |
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The wavelength of X-rays is of the order of |
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Mesons are found in |
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Which radioactive pollutant has recently drawn to public, due to its occurrence in the building material? |
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Which of the following shows the masses of the three elementary particles in decreasing order? |
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What is the wavelength of visible spectrum? |
Answer |