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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
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Which among the following species have the same number of electrons in its outermost as well as penultimate shell: (1) Mg 2+ (2) O 2-
what is the characteristics of water?
What are the most significant properties of permanent magnetic materials? Explain. Ans: The most significant properties of permanent magnetic materials are (i) Remanen
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