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प्रश्न
What changes occurs in the nucleus of radioactive elements when it emits (a) an alpha particle (b) beta particle and (c) gamma radiations? Give one example in each case in support of your answer.
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उत्तर
The following changes occur when an atom emits
An alpha particle: atomic number decreases by 2 and mass number decreases by 4.
Example: \[\ce{^238_92 U -> ^234_90 Th + ^4_2 He}\]
A beta particle: atomic number increases by one, but mass number does not change.
Example: \[\ce{^14_6 C -> ^14_7 N + ^0_-1 β}\]
Gamma particle: it does not change anything in the nucleus, the energy of the nucleus decreases.
number does not change.
Example: \[\ce{^A_Z X^* -> ^A_Z X + γ}\]
संबंधित प्रश्न
A nucleus is \[\ce {^24_11 Na}\] is β-radioactive.
What are the numbers 24 and 11 called?
A nucleus of stable phosphorus has 15 protons and 16 neutrons.
- What is its atomic number and mass number?
- The nucleus of radio phosphorous has one neutron more than the stable nucleus. What will be its atomic number and mass number?
- What will be the atomic number and mass number of new nucleus formed by decay of a β-particle by the radio phosphorus in part (b)?
Complete the following nuclear change:
\[\ce {^a_x P -> Q + ^0_-1β}\]
Complete the following nuclear change:
\[\ce{^238_92U -> ^234_90Th}\] + ______ + energy
Complete the following nuclear change:
\[\ce {^238_92 P \text ->[α] Q \text ->[β] R \text ->[β] S}\]
Complete the following nuclear change:
\[\ce {^A_Z X \text ->[α] X_1 \text ->[γ] X_2 \text ->[2β] X_3}\]
An element P disintegrates by α-emission and the new element suffers two further disintegration, both by β-emission, to form an element Q. Explain that fact P and Q are isotopes.
Name the radiations that are emitted during the decay of a nucleus, which has highest penetrating power?
Does the emission of gamma radiation result in a change in the mass number?
A radioactive source emits three type of radiations.
From which part of the atom do these radiations come?
