The number of protons, neutrons and electrons in , respectively, are:
1. 104, 71 and 71
2. 71, 71 and 104
3. 175, 104 and 71
4. 71, 104 and 71
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAn element X has the following isotopic composition :
200X: 90%
199X: 8.0%
202X: 2.0%
The weighted average atomic mass of the naturally-occurring element X is closest to:
1. 200 amu
2. 201 amu
3. 202 amu
4. 199 amu
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe nuclei of which one of the following pairs are isotones :
1.
342.
3.
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology