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When a radioactive element emits successivelyone α-particle and two β-particles, the massnumber of the daughter element [1999]
- a)is reduced by 4 units
- b)remains the same
- c)is reduced by 2 units
- d)is increased by 2 units
Correct answer is option 'A'. Can you explain this answer?
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Verified Answer
When a radioactive element emits successivelyone α-particle and ...
Mass number is effected by emmision of α
particle while β particle has negligible mass
does not effect mass number. e.g
particle while β particle has negligible mass
does not effect mass number. e.g
Most Upvoted Answer
When a radioactive element emits successivelyone α-particle and ...
Or more alpha particles, it undergoes alpha decay. This process involves the emission of an alpha particle, which is a helium nucleus consisting of two protons and two neutrons. When an alpha particle is emitted, the atomic number of the radioactive element decreases by 2 and the mass number decreases by 4. This is because the emission of an alpha particle reduces the number of protons and neutrons in the nucleus of the element.
For example, if a radioactive element with an atomic number of 92 (such as uranium-238) undergoes alpha decay, it will emit an alpha particle. This alpha particle consists of 2 protons and 2 neutrons, so the atomic number of the element decreases by 2 to become 90 (such as thorium-234). The mass number also decreases by 4, as 2 protons and 2 neutrons are lost from the nucleus.
Alpha decay is a common mode of radioactive decay for heavy elements, as it helps to stabilize the nucleus by reducing the number of protons and neutrons. This process continues until the nucleus reaches a stable configuration.
For example, if a radioactive element with an atomic number of 92 (such as uranium-238) undergoes alpha decay, it will emit an alpha particle. This alpha particle consists of 2 protons and 2 neutrons, so the atomic number of the element decreases by 2 to become 90 (such as thorium-234). The mass number also decreases by 4, as 2 protons and 2 neutrons are lost from the nucleus.
Alpha decay is a common mode of radioactive decay for heavy elements, as it helps to stabilize the nucleus by reducing the number of protons and neutrons. This process continues until the nucleus reaches a stable configuration.
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When a radioactive element emits successivelyone α-particle and two β-particles, the massnumber of the daughter element [1999]a)is reduced by 4 unitsb)remains the samec)is reduced by 2 unitsd)is increased by 2 unitsCorrect answer is option 'A'. Can you explain this answer?
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