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Q : What is called an effective nuclear charge?
(A) The proton present is in the most stable state
(B) Orbitals with the same energy
(C) Bottom state
(D) Total positive charge of the nucleus, which is effective on the electron.
Effective nuclear charge refers to the charge that the outermost (valence) electron has. Additionally, electron or multi-electron takes into account the number of electrons shielding around the nucleus.
What is electronic configuration?
(A) Breakage of electrons
(B) Expansion of electrons
(C) The distribution of electrons in the orbitals of atoms.
(D) None of these
The way electrons are arranged in different shells of an atom of an element. In nuclear physics and quantum chemistry, the arrangement of electrons in a molecule, atom or any other physical structure is called electrical configuration.
Who gave the principle “All four quantum numbers of two electrons present in an atom cannot be the same”?
(A) Heijnevarga
(B) Rutherford
(C) Goutsimt
(D) Pauli
Pauli's exclusion principle states that, "No two electrons in an atom can have all four quantum numbers in common."
German chemist John Doreiner was the first to indicate that there is a definite tendency in the properties of elements. In which year did he say this?
(A) In the early decades of 1800
(B) In the early decades of 1900
(C) In the early decades of 1700
(D) None of these
In the history of the periodic table, the German scientist Dobereiner (1817) created a triad of three elements, which when placed in ascending order of atomic mass, the atomic mass of the middle element is approximately the average of the atomic masses of the other two elements. This rule is called Döbereiner's rule of tries.
Who was the discoverer of quantum?
(A) Henry
(B) Eystein
(C) Planck
(D) Neel Bor
The correct answer is Max Planck. Quantum theory was proposed by physicist Max Planck in 1900, when he hypothesized that energy was made up of 'quanta' or individual units.
What is the wavelength of X-rays?
(A) 0.1 nm
(B) 0.2 nm
(C) 0.3 nm
(D) 0.4 nm
X-rays have wavelengths from 0.01 to 10 nanometers, frequencies from 30 petahertz to 30 exahertz (3 × 1016 Hertz to 3 × 1019 hertz (Hz)) and energies from 120 electron volts to 120 kilo electron volts. The wavelength of X-rays is shorter than that of ultraviolet rays and longer than that of gamma rays.
What are called nucleons?
(A) Protons and neutrons present in the nucleus.
(B) Rays emitted from Pin
(C) Atom
(D) None of these
Nucleon is the collective name for two important subatomic particles: the neutron and the proton. Nucleon is one of two types of subatomic particles (neutron and proton) that are located in the nuclei of atoms. Their number is called atomic mass number.
Who gave the electronic rule of chemical bonding?
(A) Cassell and Lewis
(B) Adam
(C) Peter Watson
(D) All wrong
In 1916 Kosel and Lewis developed an important theory of chemical bonding between atoms known as the electronic theory of chemical bonding.
What is called the equilibrium distance between the nuclei of bonded atoms in a molecule?
(A) Multiple Bonds
(B) Two-Length
(C) Bond length
(D) None of these
The equilibrium distance between the nuclei of atoms bonded to a molecule is called bond length.
What is called wave number?
(A) Energy Waves
(B) Number of neutron rays
(C) Number of electron rays
(D) The number of wavelengths per unit length.
A wave number, or wavenumber, refers to the spatial frequency of a wave at a specific unit distance. Wave number is measured either in cycles per unit distance or in radians per unit distance, depending on the context. A wave number is related to but distinct from frequency, which is temporal in nature.
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