Fundamental and Non-Fundamental Subatomic Particles

What are isodiaphers? Explain with an example.

Select whether the following statement is True or False:

Electrons are electrically neutral subatomic particles.

Pipeline Test 4

What is the order of the ionic radii of isoelectronic species ${\mathrm{N}}^{3-}, {\mathrm{O}}^{-2}$ and ${\mathrm{F}}^{-}$ in $\stackrel{\mathrm{o}}{\mathrm{A}}$?

How many stable isotopes of carbon have been identified?

If an atom ${}_8\mathrm{B}$ is an isobar of ${}_7\mathrm{A}$ and  atom ${}_9\mathrm{C}^{17}$ is isotone to $\mathrm{B}$, then the mass number of $\mathrm{A}$ and $\mathrm{B}$ are ..............., respectively.

For the following nuclear reaction: 

${}_{88}{\mathrm{Ra}}^{226}\stackrel{\mathit{-}\alpha }{\to }\mathrm{Rn}\stackrel{\mathit{-}\alpha }{\to }\mathrm{Po}\stackrel{\mathit{-}\alpha }{\to }\mathrm{Pb}\stackrel{\mathit{-}\beta }{\to }\mathrm{Bi}$

What is the correct statement?

 By successive decay ${}_{92}{\text{U}}^{238}$ changed to ${}_{82}{\text{Pb}}^{206}$, when a sample of uranium ore was analysed. It was found that it contains 1g of U²³⁸ and 0.1 g of Pb²⁰⁶, considering that all the Pb²⁰⁶ had accumulated due to the decay of U²³⁸. Calculate the age of the ore. (Half-life of U²³⁸ = 4.5 × 10⁹ yrs).

${}_{92}{\text{U}}^{238}$ by successive decay changes to ${}_{82}{\text{Pb}}^{206}$, when a sample of uranium ore was analysed it was found that it contains 1g of $U^{238}$ and 0.1 g of $P{b}^{206}$, considering that all the $P{b}^{206}$ had accumulated due to decay of $U^{238}$. (Half-life of $U^{238}$ = 4.5 × 10⁹ yrs).

Calculate the age of the ore ?

The half-life of a radioactive isotope is three hours. If the initial mass of the isotope were 256 g, the mass of it in grams remaining undecayed after 18 hours would be:

Review the nuclear reaction: 

${}_{88}R{a}^{226}\stackrel{-\alpha }{\to }Rn\stackrel{-\alpha }{\to }Po\stackrel{-\alpha }{\to }Pb\stackrel{-\beta }{\to }Bi$

Point out the correct statement-

The number of neutron in tritium is

The nitride ion in lithium nitride is composed of

Which of the following has the same mass as that of an electron

The electron is

Under ambient conditions, which among the following surfactants will form micelle in aqueous solution at lowest mole concentration?

Fill in the blank :

${}_{92}^{235}\text{U}+{}_0^1\text{n}\to \text{?}+{}_{36}^{92}\text{Kr}+3{}_0^1\text{n}$

Atomic number and mass number of an element $\mathrm{M}$ are $25$ and $52$ respectively. Determine the number of electrons, protons and neutrons in ${\mathrm{M}}^{+2}$ ion respectively.

When FeCl₃ solution is added to NaOH, a negatively charged solution is obtained. It is due to the 

In an adsorption experiment, a graph between log  $\frac{\text{x}}{\text{m}}$  versus log p was found to be linear with a slope of 45^o. The intercept on the log  $\frac{\text{x}}{\text{m}}$  axis was found to be 0.30103. Calculate the amount of the gas adsorbed per gram of charcoal under a pressure of 1 atm.
[log₁₀ 2 = 0.301032]