Class 11ChemistryStructure of AtomDiscovery and Properties of anode, cathode rays neutron and Nuclear structure
MediumPositronium is the name given to an atom-like combination formed between
- A$A$. $A$ positron and a proton
- B$B$. $A$ positron and a neutron
- C$C$. $A$ positron and $\alpha$-particle
- D$D$. $A$ positron and an electron
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Similar Questions
The increasing order (lowest first) for the values of $e/m$ (charge/mass) for:
MediumIIT 1984
View SolutionWhich of the following statements is correct about the cathode rays?
$1$. These rays start from anode and move towards cathode.
$2$. They are visible with human eye.
$3$. In presence of electric and magnetic fields,they behave like positively charged particles.
$4$. Their characteristic does not depend on the nature of material at electrode.
$1$. These rays start from anode and move towards cathode.
$2$. They are visible with human eye.
$3$. In presence of electric and magnetic fields,they behave like positively charged particles.
$4$. Their characteristic does not depend on the nature of material at electrode.
The ratio of specific charge of a proton to that of an $\alpha -$particle is:
Medium
View SolutionThe relationship between the radius of the nucleus $(R)$ and the mass number $(A)$ is given by .......
Easy
View SolutionAn atom is defined as :
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