The number of protons, neutrons and electrons in Lu71175, respectively, are:

1.  104, 71 and 71

2.  71, 71 and 104

3.  175, 104 and 71

4.  71, 104 and 71 

Subtopic:  Introduction of Atomic Structure | Number of Electron, Proton & Neutron |
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An 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

Subtopic:  Number of Electron, Proton & Neutron |
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The nuclei of which one of the following pairs are isotones :

1.   34 Se74,31Ga71

2.  38Sr84,38Sr86

3.  42Mo92,40Zr92

4.  20Ca40,16S32

Subtopic:  Number of Electron, Proton & Neutron |
To view explanation, please take trial in the course below.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology