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The fundamental particles which arc responsible for keeping nucleons together is
Mesons are fundamental particles composed of a quark and an antiquark. They are responsible for the strong nuclear force that binds protons and neutrons together in the nucleus, keeping the nucleons together.
The positron is as heavy as
The positron is the antiparticle of the electron, having the same mass as an electron but with a positive charge. It has the same mass as an electron, which is much less than the masses of a neutron, alpha particle, or proton.
Atoms may be regarded as comprising of protons, electrons and neutrons. If the mass attributed to the neutrons were halved and that attributed to electrons were doubled then atomic mass of would
How many electrons in an atom with atomic number 105 can have (n +l) = 8 ?
The principal quantum number (n) represents the main shell, and the azimuthal quantum number (l) represents the subshell within that main shell. For (n + l) = 8, the possible combinations are: n = 8, l = 0 (s subshell), which can hold 2 electrons, and n = 7, l = 1 (p subshell), which can hold 6 electrons. Together, these can accommodate 2 + 6 = 8 electrons for an atom with atomic number 105.
The size of the nucleus is approximately
The line spectrum ot two elements is not identical because .
The line spectrum of two elements is not identical because they have different energy level schemes. The electrons in different elements have different energy levels, and transitions between these levels result in the emission or absorption of specific wavelengths of light, giving rise to unique line spectra.
Bohr’s atomic model can explain the spectrum of
Bohr's atomic model can explain the spectrum of atoms or ions which are uni-electron species, such as hydrogen atoms, singly ionized helium (He+), or doubly ionized lithium (Li2+). The model is limited to systems with only one electron orbiting the nucleus.
An atom has 2 K, 8 L, 11 M, 2 N electrons, the total number of s-electrons will be
The given atom has 2 K-shell electrons (1s), 8 L-shell electrons (2s and 2p), 11 M-shell electrons (3s, 3p, and 3d), and 2 N-shell electrons (4s). The total number of s-electrons, which have the spherical distribution, is 2 (1s) + 2 (2s) + 2 (3s) + 2 (4s) = 8.
For a sub-shell with azimuthal quantum number l, the total values of magnetic quantum number m can be related to l as
A near U.V. photon of 300 nm is absorbed by a gas and then remitted as two photons. One photon is red with wavelength760 nm. Hence wavelength of the second photon is
$ E - = E_1 + E_2 now E = { hc \over \lambda} $ $ \therefore { 1 \over \lambda } = { 1 \over \lambda_1 } + { 1 \over \lambda_2 } $
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The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.