Atomic Structure · Chemistry · WB JEE

The plot of radial probability density（ $4 \pi r^2 R^2$ ）against $r$ for an electron in $n p$ orbital of a many electron atom is given below．

The value of $n$ is

The mass of an electron is $9 \cdot 1 \times 10^{-31} \mathrm{~kg}$ ．If its K ．E．is $3 \cdot 0 \times 10^{-25} \mathrm{~J}$ ，its wavelength is（approximately）

Consider an electron moving in the first Bohr orbit of a $$\mathrm{He}^{+}$$ ion with a velocity $$v_1$$. If it is allowed to move in the third Bohr orbit with a velocity $$v_3$$, then indicate the correct $$v_3: v_1$$ ratio.

Which hydrogen like species will have the same radius as that of $$1^{\text {st }}$$ Bohr orbit of hydrogen atom?

Two base balls (masses : m$$_1$$ = 100 g, and m$$_2$$ = 50 g) are thrown. Both of them move with uniform velocity, but the velocity of m$$_2$$ is 1.5 times that of m$$_1$$. The ratio of de Broglie wavelengths $$\lambda$$(m$$_1$$) : $$\lambda$$(m$$_2$$) is given by

The number of unpaired electron in Mn²⁺ ion is

The de-Broglie wavelength ($$\lambda$$) for electron (e), proton (p) and He²⁺ ion ($$\alpha$$) are in the following order. Speed of e, p and $$\alpha$$ are the same

In Bohr model of atom, radius of hydrogen atom in ground state is r₁ and radius of He⁺ ion in ground state is r₂. Which of the following is correct?

Which one of the following is the correct set of four quantum numbers (n, 1, m, s) ?

An electron in the 5d orbital can be represented by the following (n, l, m) values