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प्रश्न
When a boron nucleus `(""_5^10"B")` is bombarded by a neutron, a α-particle is emitted. Which nucleus will be formed as a result?
उत्तर
It is given that when a boron nucleus `(""_5^10"B")` is bombarded by a neutron, an α-particle is emitted.
Let X nucleus be formed as a result of the bombardment.
According to the charge and mass conservation,
`""_5^10"B"` `+ _0^1n → X + _2^4He`
Charge : 5 0 3 2
Mass : 10 1 7 4
The mass number of X should be 7 and its atomic number should be 3.
`therefore X = _3^7Li`
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संबंधित प्रश्न
The graph of ln `("R"/"R"_0)` versus ln A (R = radius of a nucleus and A = its mass number) is ______.
Two lithium nuclei in a lithium vapour at room temperature do not combine to form a carbon nucleus because
Fusion processes, like combining two deuterons to form a He nucleus are impossible at ordinary temperatures and pressure. The reasons for this can be traced to the fact ______.
- nuclear forces have short range.
- nuclei are positively charged.
- the original nuclei must be completely ionized before fusion can take place.
- the original nuclei must first break up before combining with each other.
