1.

The nucleus of the element having atomic number 25 and atomic weight 55 will contain [CPMT 1986; MP PMT 1987]

A.        25 protons and 30 neutrons
B.        25 neutrons and 30 protons
C.        55 protons
D.        55 neutrons
Answer» B.        25 neutrons and 30 protons


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