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When beryllium is bombarded with α -particles, extremely penetrating radiations which cannot be deflected by electrical or magnetic field are given out. These are:
(1) A beam of protons
(2) α -rays
(3) A beam of neutrons
(4) X-rays
Ans: A beam of neutrons
What are the chemical laws and their verification
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The angle among the lines joining the nuclei of the bonded atom with a central atom is known as bond angle.
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