Some Basic Concepts Of Chemistry Question 129
Question: It is known that atoms have proton, neutron, electron and nucleus. If the mass of neutron assumed to be half of its original value whereas that of proton is assumed to be twice the original value, then the atomic mass of $ _6C^{14} $ will be
Options:
A) 14.3% less than original value
B) 14.3% greater than original value
C) 28.6% less than original value
D) 28.6% greater than original value
Show Answer
Answer:
Correct Answer: A
Solution:
[a] Idea: To solve this problem complete the all reaction then choose the correct option. Number of protons in $ _6C^{14}=6 $ Number of neutrons in $ _6C^{14}=8 $ New atomic mass of $ _6C^{14}=\frac{8}{2}\times 6\times 2 $
$ =4+16=16 $ % increase in mass $ =\frac{16-14}{14}\times 100=14.3% $
