Which type of decay converts`"_3^8 Li` to `"_4^8 Be`?

1. alpha decay
2. beta decay
3. gamma decay
4. none of these
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Answer: B
Explanation:
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An increase in atomic number results by which type of radioactive decay?

1. alpha decay
2. beta decay
3. gamma decay
4. none of these
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Answer: B
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Which one is the result of electron capture?

1. a positron is formed
2. gamma rays are emitted
3. a neutron is formed
4. an alpha-particle is formed
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Answer: C
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Naturally occuring non-radioactive nuclides most commonly contain which combination of the number of protons and the number of neutrons?

1. odd protons, even neutrons
2. even protons, even neutrons
3. odd protons, odd neutrons
4. even protons, odd neutrons
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Answer: B
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The spontaneous transformation of one nucleus into another occurs only if:

1. the process results in a neutron/proton ratio of 1.0 in the products
2. the process is endothermic
3. the combined mass of products is less than the mass of the original nuclide
4. sufficient energy is absorbed from the surroundings to derive the process
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Answer: C
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When Xe-123 emits a gamma ray, what will be the product?

1. `"_53^123I`

2. `"_55^123Cs`

3. `"_52^119Te`

4. `"_54^123Xe`

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Answer: D
Explanation:
• The atomic number and atomic mass remains unchanged during gamma ray emission.
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In the following nuclear reaction which particle is missing; `"_13^27 Al` + ?  →  `"_0^1 n` + `"_15^30 P`

1. alpha

2. beta

3. gamma

4. proton

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Answer: A
Explanation:
• `"_13^27 Al` + `"_2^4 He` `to`  `"_0^1 n` + `"_15^30 P`
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Which particle is produced when P-29 decays to Si-29?

1. alpha
2. beta
3. gamma
4. positron
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Answer: D
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Which isotope on bombardment with a neutron produces Au-198 and a proton?

1. `"_80^197Hg`

2. `"_80^198Hg`

3. `"_81^199Tl`

4. `"_78^197Pt`

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Answer: B
Explanation:
• `"_80^198Hg` + `"_0^1 n`  → `"_79^198 Au` + `"_1^1H`
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In the following nuclear equation select the missing particle: `"_12^24 Mg` + `"_1^2 H` `to` `"_2^4 He` + ?

1. `"_13^26 Al`

2. `"_13^22 Al`

3. `"_11^22 Na`

4. `"_10^20 Ne`

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Answer: C
Explanation:
• `"_12^24 Mg` + `"_1^2 H``to``"_2^4 He` + `"_11^22 Na`
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