Question

1. which type of reaction does the diagram illustrate?

a) fission
b) alpha decay
c) beta decay
d) fusion

1. ²³⁵₉₂u + ¹₀n → ¹⁴²₅₆ba + ⁹¹₃₆kr + 3x + energy

for the balanced equation, which particle is represented by x?
a) ¹₀n
b) ¹₁h
c) ⁴₂h
d) ⁰₋₁e

1. which reaction represents fusion?

a) ²³⁵₉₂u + ¹₀n → ¹₄₂₅₆ba + ⁹¹₃₆kr + 3¹₀n
b) ²²⁶₈₈ra → ²²²₈₆rn + ⁴₂he
c) ²₁h + ²₁h → ⁴₂he
d) ¹⁴₇n + ¹₀n → ¹⁴₆c + ¹₁h

1. which reaction represents fission?

a) ¹⁴₇n + ¹₀n → ¹⁴₆c + ¹₁h
b) ²²⁶₈₈ra → ²²²₈₆rn + ⁴₂he
c) ²³⁵₉₂u + ¹₀n → ¹₄₂₅₆ba + ⁹¹₃₆kr + 3¹₀n
d) ²₁h + ²₁h → ⁴₂he

Explanation:

Step1: Identify reaction in question 8

The diagram shows a large nucleus splitting into smaller nuclei and releasing neutrons, which is characteristic of fission.

Step2: Balance the equation in question 9

For the equation $^{235}_{92}U + ^{1}_{0}n
ightarrow^{142}_{56}Ba+^{91}_{36}Kr + 3X+ \text{energy}$, balance mass - number and atomic - number. Mass - number: $235 + 1=142 + 91+3\times A$, where $A$ is the mass - number of $X$. Solving gives $A = 1$. Atomic - number: $92+0 = 56+36 + 3\times Z$, where $Z$ is the atomic - number of $X$. Solving gives $Z = 0$. So $X$ is a neutron $^{1}_{0}n$.

Step3: Recall fusion reaction in question 10

Fusion is the combination of two light nuclei to form a heavier nucleus. The reaction $^{2}_{1}H+^{2}_{1}H
ightarrow^{4}_{2}He$ is a fusion reaction.

Step4: Recall fission reaction in question 11

Fission is the splitting of a large nucleus into smaller nuclei. The reaction $^{235}_{92}U+^{1}_{0}n
ightarrow^{92}_{35}Br + ^{141}_{57}La+3^{1}_{0}n$ is a fission reaction.

Answer:

1. a) Fission
2. a) $^{1}_{0}n$
3. c) $^{2}_{1}H + ^{2}_{1}H

ightarrow^{4}_{2}He$

1. c) (assuming the correct fission - like reaction is intended as the one with uranium splitting)