Class 11ChemistryStructure of AtomDiscovery and Properties of anode, cathode rays neutron and Nuclear structure
MediumAlpha particles are $...$ times heavier (approximately) than neutrons.
- A$2$
- B$4$
- C$3$
- D$2\frac{1}{2}$
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The positron was discovered by
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| $A$. Chadwick | $1$. Cathode rays |
| $B$. Rutherford | $2$. $X$-ray spectra |
| $C$. Moseley | $3$. Discovery of neutrons |
| $D$. $J$. $J$. Thomson | $4$. Nuclear atom model |
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