MCQ
In $_{88}Ra^{226}$ nucleus, there are
- ✓$138$ protons and $88$ neutrons
- B$138$ neutrons and $88$ protons
- C$226$ protons and $88$ electrons
- D$226$ neutrons and $138$ electrons
✓
Answer
Correct option: A.
$138$ protons and $88$ neutrons
$138$ neutrons and $88$ protons
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
Temperature above which a ferromagnetic substance becomes paramagnetic is called(a) Critical temperature(b) Boyle's temperature(c) Debye's temperature(d) Curie temperature
The narrowest hysterisis loop is for:
Heavy water is(a) Water at 4 ℃(b) Compound of deuterium and oxygen (c) Compound of heavy oxygen and heavy hydrogen(d) Water, in which soap does not lather
If two electric bulbs have 40 W and 60 W rating at 220 V, then the ratio of their resistances will be(a) 9 : 4 (b) 4 : 3(c) 3 : 8 (d) 3 : 2
The work function of aluminium is 4.2 eV.If two photons each of energy 3.5 eV strike an electron of aluminium, then emission of electrons will be:
In figure, there is a conducting ring having resistance $R$ placed in the plane of paper in a uniform magnetic field $B_0$. If the ring is rotating in the plane of paper about an axis passing through point $O$ and perpendicular to the plane of paper with constant angular speed $\omega$ in clockwise direction, then.
→In the given figure distance of the point from $A$ where the electric field is zero is
→When water droplets merge to form a bigger drop:
- Energy is liberated.
- Energy is absorbed.
- Energy is neither liberated nor absobred.
- Energy may either be liberated or absorbed depending on the nature of the liquid.
The following truth table is for: ABY 110 101 011 001
An electron and a proton are in motion with equal kinetic energy. Which of the following relation is true ?