Structure of Atom · Chemistry · NEET

The quantum numbers of four electrons are given below :

I. $$n=4 ; I=2 ; m_1=-2 ; s=-\frac{1}{2}$$

II. $$n=3 ; I=2 ; m_1=1 ; s=+\frac{1}{2}$$

III. $$n=4 ; I=1 ; m_1=0 ; s=+\frac{1}{2}$$

IV. $$n=3 ; I=1 ; m_1=-1 ; s=+\frac{1}{2}$$

The correct decreasing order of energy of these electrons is

Given below are two statements:

Statement I: The Balmer spectral line for H atom with lowest energy is located at $$\frac{5}{36} R_H \mathrm{~cm}^{-1}$$.

($$\mathrm{R}_{\mathrm{H}}=$$ Rydberg constant)

Statement II: When the temperature of blackbody increases, the maxima of the curve (intensity and wavelength) shifts to shorter wavelength.

In the light of the above statements, choose the correct answer from the options given below:

The energy of an electron in the ground state $$\mathrm{(n=1)}$$ for $$\mathrm{He}^{+}$$ ion is $$\mathrm{-x} \mathrm{~J}$$, then that for an electron in $$\mathrm{(n=2)}$$ state for $$\mathrm{Be}^{3+}$$ ion in $$\mathrm{J}$$ is

Match List I with List II.

Choose the correct answer from the options given below :

Incorrect set of quantum numbers from the following is :

Given below are two statements:

Statement I : The value of wave function, $$\psi $$ depends upon the coordinates of the electron in the atom.

Statement II : The probability of finding an electron at a point within an atom is proportional to the orbital wave function.

In the light of the above statements, choose the correct answer from the options given below:

Select the correct Statements from the following :

A. Atoms of all elements are composed of two fundamental particles.

B. The mass of the electron is $$9.10939 \times 10^{-31} \mathrm{~kg}$$.

C. All the isotopes of a given elements show same chemical properties.

D. Protons and electrons are collectively known as nucleons.

E. Dalton's atomic theory, regarded the atom as an ultimate particle of matter.

Choose the correct answer from the options given below.

The relation between $$\mathrm{n}_{\mathrm{m}},\left(\mathrm{n}_{\mathrm{m}}=\right.$$ the number of permissible values of magnetic quantum number $$(\mathrm{m})$$) for a given value of azimuthal quantum number $$(l)$$, is

Match List-I with List-II :

Choose the correct answer from the options given below :

When electromagnetic radiation of wavelength 300 nm falls on the surface of a metal, electrons are emitted with the kinetic energy of 1.68 $$\times$$ 10⁵ J mol^$$-$$1. What is the minimum energy needed to remove an electron from the metal?

(h = 6.626 $$\times$$ 10^$$-$$34 Js, c = 3 $$\times$$ 10⁸ ms^$$-$$1, N_A = 6.022 $$\times$$ 10²³ mol^$$-$$1)

Identify the incorrect statement from the following.

If radius of second Bohr orbit of the He⁺ ion is 105.8 pm, what is the radius of third Bohr orbit of Li²⁺ ion?