The ionisation energy of an electron in the ground state of helium atom is 24.6 eV.
The ionisation energy of an electron in the ground state of helium atom is 24.6 eV. The energy required to…
7 years ago
Atoms and Nuclei
Light emitted during the de excitation of electron from n=3 to n=2, when incident
Light emitted during the de excitation of electron from n=3 to n=2, when incident on a metal, photoelectrons are just…
7 years ago
The ratio of speed of an electron in ground state in Bohr’s first orbit of hydrogen atom
The ratio of speed of an electron in ground state in Bohr's first orbit of hydrogen atom to velocity of…
7 years ago
The Kα X-ray of molybdenum has a wavelength of 71×10⁻¹² m. If the energy of a molybdenum
The Kα X-ray of molybdenum has a wavelength of 71x10⁻¹² m. If the energy of a molybdenum atom with K-…
7 years ago
The control rods used in a nuclear reactor can be made up of
The control rods used in a nuclear reactor can be made up of Options (a) graphite (b) cadmium (c) uranium…
7 years ago
In Moseley’s law √ν=a(z-b), the values of the screening constant for K-series
In Moseley's law √ν=a(z-b), the values of the screening constant for K-series and L-series of X-rays are respectively Options (a)…
7 years ago
The wavelength of light emitted from second orbit to first orbit in a hydrogen atom is
The wavelength of light emitted from second orbit to first orbit in a hydrogen atom is Options (a) 1.215x10⁻⁷ m…
7 years ago
The sodium nucleus ₁₁Na²³ contains
The sodium nucleus ₁₁Na²³ contains Options (a) 11 electrons (b) 12 protons (c) 23 protons (d) 12 neutrons Correct Answer:…
7 years ago
The Rutherford scattering experiment proves that an atom consists of
The Rutherford scattering experiment proves that an atom consists of Options (a) a sphere of positive charge in which electrons…
7 years ago
If, an electron in hydrogen atom jumps from an orbit of level n=3 to an orbit
If, an electron in hydrogen atom jumps from an orbit of level n=3 to an orbit of level n=2, emitted…
7 years ago