Critical Thinking Problem Set -Chapter 11 20 Points-You must show work for full

Question

Critical Thinking Problem Set -Chapter 11 20 Points-You must show work for full credit; Plea r answer alance the nuclear reactions by identifying what the " stands for in each of the following reactions He 113 1) 99 101 250 2) For centuries, alchemists dreamed of turning base metals into gold. The dream finally becar reality when it was shown that mercury-198 can be converted into gold-198 on bombardmer neutrons. What small particle is produced in addition to gold-198? Write a balanced nucle n? produced inthe

Explanation / Answer

a)

Lets say ? is X

as we know that mass is conserved

mass of X = 113 - 4 = 109

no. of protons of X = 49 - 2 = 47

Ag has atomic no. 47

10947Ag

b.

mass in products = 13+1 = 14 = mass in reactant = 4 + X

X mass = 10

protons = 7 - 2 = 5

Boron has atomic no. 5

105B

c).

mass 140

protons = -1 + X = 55

X = 56

Barium has atomic no. 56

14056Ba

d)

similarly it can be done for others

248-4 = 244

98 - 2 = 96

Curium has atomic no. 96

24496Cu

e)

neutron balance 235 +1 = 160 + 72 + X

X = 4

f)

235+1 = 87 + 3 + X

X mass = 146

proton = 57

Lanthanum has atomic no. 57

14657La

g)

126 and 51

12651Sb

h)

206 neutrons

86 protons

radon

20686Rn

i)

X =42He

j)

257 and 103

Lawrencium has atomic no. 103

257103Lr

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