A sample of lead isotope Pb decays by emitting an alpha particle to form the nuclide W. If the half- life of the lead isotope is 3 hours, which of the following statements is/are correct? 1. W has an atomic mass of 205 2. The atomic number of W is 80 3. After 6 hours, 50% of the lead isotope would have decayed. 40. A B
A sample of lead isotope Pb decays by emitting an alpha particle to form the nuclide W. If the half- life of the lead isotope is 3 hours, which of the following statements is/are correct? 1. W has an atomic mass of 205 2. The atomic number of W is 80 3. After 6 hours, 50% of the lead isotope would have decayed. 40. A B
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Transcribed Image Text:A sample of lead isotope Pb decays by
emitting an alpha particle to form the nuclide
W. If the half- life of the lead isotope is 3
hours, which of the following statements
is/are correct?
209
40.
82
1. W has an atomic mass of 205
2. The atomic number of W is 80
3. After 6 hours, 50% of the lead isotope
would have decayed.
A.
BCD
Transcribed Image Text:Directions summarised
A
B
1,2,3
1,2
2,3
Only
All
Only
Only
correct
correct
correct
correct
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