Atomic Structur...

Electronic configuration of the element having atomic number 24.

The atom with the given atomic number Z=17, and the atomic mass A=35.5 is

Correct expression for mass number A is

According to quantum mechanics ψ²(r) the wave function squared gives

Spin quantum number with two spin states of the electron represented by two arrows, ↑ (spin up) and ↓ (spin down) was introduced to account for

Values of e/m (charge/mass) in the categories alpha particle (α), electron (e) and protons (p) increase in the order:

A gas absorbs a photon of 355 nm and emits at two wavelengths. If one of the emissions is at 680 nm, the other is at: 

The electronic configuration 1s²2s²2p¹ belongs to

The energy associated with the first orbit in the hydrogen atom is -2.18 x 10⁻¹⁸ J/atom. What is the energy associated with the fifth orbit?

Isobars are the atoms with

Due to the presence of electrons in the inner shells, the electron in the outer shell will not experience the full positive charge of the nucleus (Ze). This is known as

Maximum number of electrons in a subshell with l = 3 and n = 4 is

Arrange the electrons present in the 4d, 3d, 4p and 3p orbitals in order of increasing energies

Isotopes are the atoms with

The Aufbau principle states : In the ground state of the atoms, the orbitals are filled in order of

Radio frequency region of the electromagnetic spectrum is used for broadcasting. It is

In an atom, an electron is moving with a speed of 600m/s with an accuracy of 0.005%. Certainity with which the position of the electron can be located is (h = 6.6 ×10⁻³⁴ Js)

Give the name and atomic number of the inert gas atom in which the total number of d-electrons is equal to the difference between the numbers of total p and total s electrons.

Photoelectric effect established that light

According to Pauli’s exclusion principle

One of the orbitals is non-directional

The ionization energy of the lowest state, also called as the ground state, is:

An cation A3+ has 18 electrons. Write the atomic number of A.

Emission spectrum of a material results from the material's (atom or molecules)

Dalton's atomic theory could not explain one of the following