a)
Let the product be X
Balance mass number on both sides
mass of Rb = mass of e + mass of X
1*77 = 1*0 + M
M = 77
Balance atomic number on both sides
atomic of Rb = atomic of e + atomic of X
1*37 = 1*1 + A
A = 36
Atomic number 36 is for element Kr
So, the product is
77-Kr
Answer:
77
Kr
36
b)
Let the product be X
Balance mass number on both sides
mass of No = mass of He + mass of X
1*251 = 1*4 + M
M = 247
Balance atomic number on both sides
atomic of No = atomic of He + atomic of X
1*102 = 1*2 + A
A = 100
Atomic number 100 is for element Fm
So, the product is
247-Fm
Answer:
247
Fm
100
c)
Let the product be X
Balance mass number on both sides
mass of Cu = mass of e + mass of X
1*66 = 1*0 + M
M = 66
Balance atomic number on both sides
atomic of Cu = atomic of e + atomic of X
1*29 = 1*-1 + A
A = 30
Atomic number 30 is for element Zn
So, the product is
66-Zn
Answer:
66
Zn
30
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