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Q.

Statement 1 : The atoms of different elements having same mass number but different atomic number are known as isobars.

Statement 2 : The sum of protons and neutrons, in the  isobars is always different.

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a

Statement 1 is true and Statement 2 is false .

b

Both Statement 1 and Statement 2 are true 

c

Statement 1 is false and Statement 2 is true.

d

Both statement(I) and statement(II) are false.

answer is B.

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Detailed Solution

  • The statement (I) that the isobars are the atoms of different elements having same mass number but different atomic number, is correct but statement 2 is false because, atomic mass is the sum of number of neutrons and protons, which should be same for isobars.
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