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NEET UG CHEMISTRY MCQ: STRUCTURE OF ATOM
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Consider the following statements.
I. is a measure of electron density at a point in an atom.
II. Radial probability function gives the probability of finding the electron at a distance (atomic radius) from the nucleus regardless of direction.
III. The shape of an orbital is defined as a surface of constant probability density that encloses some large fractions of the probability of finding the electron.
Select the correct statements.
I. is a measure of electron density at a point in an atom.
II. Radial probability function gives the probability of finding the electron at a distance (atomic radius) from the nucleus regardless of direction.
III. The shape of an orbital is defined as a surface of constant probability density that encloses some large fractions of the probability of finding the electron.
Select the correct statements.
View answer and explanation
Correct option: D
All of these
Option D (All of these) is correct because all three statements accurately describe the concepts of electron density, radial probability function, and orbital shape in quantum mechanics.
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Reason: The oscillating electric and magnetic fields produced by oscillating charged particles are parallel to each other and both are perpendicular to the direction of propagation of the wave. S-I: The orbital has maximum electron density along the y axis and its nodal plane is xz plane.
S-II : For a given atom, for all values of , the -orbitals have the same shape, but the overall size decreases as '' increases. S-I: Elements like and were discovered when their minerals were analysed by spectroscopic methods.
S-II: The element helium was discovered in the sun by spectroscopic method. In which one of the following, the number of protons is greater than number of neutrons but number of protons is less than the number of electrons?
Reason: The oscillating electric and magnetic fields produced by oscillating charged particles are parallel to each other and both are perpendicular to the direction of propagation of the wave. S-I: The orbital has maximum electron density along the y axis and its nodal plane is xz plane.
S-II : For a given atom, for all values of , the -orbitals have the same shape, but the overall size decreases as '' increases. S-I: Elements like and were discovered when their minerals were analysed by spectroscopic methods.
S-II: The element helium was discovered in the sun by spectroscopic method. In which one of the following, the number of protons is greater than number of neutrons but number of protons is less than the number of electrons?