Question
An $\alpha-$particle captures an electron. What does it change to?
✓
Answer
An $\alpha$ particle has two protons and two neutrons and zero electrons.It is written as $^4_2\text{He}^{2+}.$
So if it captures an electron, the reaction is: $^4_2\text{He}^{2+} + +e^{− }\rightarrow ^4_2\text{He}^{+}$
So if it captures an electron, the reaction is: $^4_2\text{He}^{2+} + +e^{− }\rightarrow ^4_2\text{He}^{+}$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
A vertical wire carries a current in upward direction. An electron beam sent horizontally towards the wire will be deflected:
In the network of resistors shown in the adjoining figure, the equivalent resistance between $A$ and $B$ is
→The radius of curvature of the path of the charged particle in a uniform magnetic field is directly proportional to(a) The charge on the particle(b) The momentum of the particle(c) The energy of the particle(d) The intensity of the field
The magnetism of magnet is due to:
A man with defective eyes cannot see distinctly object at the distance more than $60 \ cm$ from his eyes. The power of the lens to be used will be
→The diffraction effect can be observed in(a) Only sound waves(b) Only light waves(c) Only ultrasonic waves (d) Sound as well as light waves
A vertical wire carries a current in upward direction. An electron beam sent horizontally towards the wire will be deflected:
- Towards right.
- Towards left.
- Upwards.
- Downwards.
Energy of photon whose frequency is $10^{12} \ \mathrm{MHz},$ will be
→The lateral displacement depends on ______:
Four lowest energy levels of $H-$atom are shown in the figure. The number of possible emission lines would be
→