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Question

Complete the following equations :
(a) 2311Na+42He2612Mg+? (b) 6429Cuβ++?
(c) 106Ag106Cd+? (d) 105B+42He137N+?

A
(a) 1H1, (b) 28Ni64, (c) 1β0, (d) 0n1,
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B
(a) 2H2, (b) 64Nu1, (c) 1β1, (d) 1n1,
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C
(a) 2H1, (b) 63Nu2, (c) 1β0, (d) 2n1,
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D
None of these
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Solution

The correct option is A (a) 1H1, (b) 28Ni64, (c) 1β0, (d) 0n1,
(a) 2311Na+42He2612Mg+AZX
12+Z=11+2
Z=1
23+4=26+A
A=1
Hence, 2311Na+42He2612Mg+11H
(b) 6429Cuβ++AZX
29=+1+Z
Z=28
64=0+A
A=64
6429Cuβ++6428Ni
(c) 10647Ag10648Cd+AZX
47=48+Z
Z=1
106=106+A
A=0
Hence,10647Ag10648Cd+01β
(d) 105B+42He137N+AZX
5+2=7+Z
Z=0
10+4=13+A
A=1
105B+42He137N+10n

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