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Write the complete symbol for (i) the ...

Write the complete symbol for
(i) the nucleus with atomic number 56 and mass number 138
(ii) the nucleus with atomic number 26 and mass number 55
(iii) the nucleus with atomic number 4 and mass number 9.

Text Solution

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(i) The element with atomic number 56 is Ba. Its symbol is `._(56)^(138)Ba`
(ii) The element with atomic number 26 is Fe. Its symbol is `._(26)^(55) Fe`
(iii) The element with atomic number 4 is Be. Its symbol is `._(4)^(9) Be`.
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