Question
A nucleus with mass number A and atomic number Z
undergoes β⁻ decay. Which of the following is correct about the daughter nucleus?Solution
In β⁻ decay, a neutron inside the nucleus is converted into a proton, emitting a beta particle (electron) and an antineutrino. Since a neutron becomes a proton, the atomic number (Z) increases by 1, but the mass number (A) remains unchanged because both protons and neutrons contribute equally to it. So, after β⁻ decay:
- Z → Z + 1
- A remains the same
351 261 181 111 51 ?
Find the 31st term of the series 25, 29, 33……
632, 560, 494, 434, ?, 332
1331 1000 729 512 ? 216
...2556 636 156 ? 6
3 5 15 75 1125 ?
...1. In series II, if ‘x’ is the right term, then find which of the following statement(s) are true.
I. x/124 is a factor 6 and 8.
73920, 9240, ?, 220, 44, 11
12 78 385 ? 4629 9260
...A number series is given below, which follows a specific pattern. If 'A' represents the 'x'th term and 'B' represents ...
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