Advertisements
Advertisements
प्रश्न
A radioactive nucleus containing 128 nucleons emits a β-particle. After β- emission the number of nucleons present in the nucleus will be ______.
विकल्प
128
129
124
127
उत्तर
A radioactive nucleus containing 128 nucleons emits a β-particle. After β- emission the number of nucleons present in the nucleus will be 128.
Explanation:
A neutron undergoes β-decay, converting it into a proton and releasing a β-particle. As a result, the mass number stays constant while the atomic number increases by 1. Therefore, there will still be 128 nucleons (the mass number).
APPEARS IN
संबंधित प्रश्न
What happens to the position of an element in the periodic table when its nucleus emits β -particle? Give reasons for your answer.
What kind of change takes place in a nucleus when a β - particle is emitted? Express it by an equation. State whether
- atomic number and
- mass number are conserved in a radioactive β - decay?
A nucleus is \[\ce {^24_11 Na} \] β-radioactive.
What general name is given to the product nucleus with respect to \[\ce{^24_11 Na}\]?
In β-emission from a radioactive substance, an electron is ejected. This electron comes from ______.
One roentgen is equal to _______ disintegrations per second.
Define critical mass.
|
The graph (fig A) illustrates the correlation between the number of protons (x-axis) and the number of neutrons (y-axis) for elements A, B, C, D, and E in the periodic table. These elements are denoted by the letters rather than their conventional symbols. When the element C, depicted in the graph, undergoes radioactive decay, it releases radioactive rays. When these rays are directed into the plane of the paper in the presence of a magnetic field, as indicated in the fig B, they experience deflection, causing them to move upwards.
|
Name the radioactive radiations emitted by the element C.
|
The graph (fig A) illustrates the correlation between the number of protons (x-axis) and the number of neutrons (y-axis) for elements A, B, C, D, and E in the periodic table. These elements are denoted by the letters rather than their conventional symbols. When the element C, depicted in the graph, undergoes radioactive decay, it releases radioactive rays. When these rays are directed into the plane of the paper in the presence of a magnetic field, as indicated in the fig B, they experience deflection, causing them to move upwards.
|
Identify the daughter element from the graph.
When happens to the (i) atomic number, (ii) mass number of the nucleus of an element when a β-particle is emitted ?
A nucleus \[\ce{^24_11Na}\] is β-radioactive.
Write the equation representing β-decay.
