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Atomic Structure

Get chapter-wise JEE Main & Advanced questions with solutions

Q JEE MAIN 2023
The total number of isoelectronic species from the given set is ____.
$\mathrm{O}^{2-}, \mathrm{F}^{-}, \mathrm{Al}, \mathrm{Mg}^{2+}, \mathrm{Na}^{+}, \mathrm{O}^{+}, \mathrm{Mg}, \mathrm{Al}^{3+}, \mathrm{F}$
JEE Main Chemistry Easy
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Q JEE MAIN 2023
The energy of an electron in the first Bohr orbit of hydrogen atom is –2.18×10–18 J. Its energy in the third Bohr orbit is ____.
JEE Main Chemistry Easy
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Q JEE MAIN 2023
The number of incorrect statement/s about the black body from the following is _______
(A) Emit or absorb energy in the form of electromagnetic...
JEE Main Chemistry Hard
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Q JEE MAIN 2023
Given below are two statements
Statement-I: According to Bohr's model of hydrogen atom, the angular momentum of an electron in a given stationary state is...
JEE Main Chemistry Easy
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Q JEE MAIN 2023
The number of following statement/s which is/are incorrect is______.
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Q JEE MAIN 2023
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R:
Assertion A: In the photoelectric effect,...
JEE Main Chemistry Medium
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Q JEE MAIN 2023
The wavelength of an electron of kinetic energy $4.50 \times 10^{-29} \mathrm{~J}$ is $\_\_\_\_$ $\times 10^{-5} \mathrm{~m}$. (Nearest integer) Given: mass of electron| is $...
JEE Main Chemistry Medium
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Q JEE MAIN 2023
If wavelength of the first line of the Paschen series of hydrogen atom is 720 nm, then the wavelength of the second line of this...
JEE Main Chemistry Medium
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Q JEE-Main_2023
The energy of one mole of photons of radiation of frequency $2 \times 10^{12} \mathrm{~Hz} \mathrm{in} \mathrm{J} \mathrm{mol}^{-1}$ is $\_\_\_\_$ . $($ Nearest integer $)\left(\right.$...
JEE Main Chemistry Medium
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Q JEE MAIN 2023
Electrons in a cathode ray tube have been emitted with a velocity of $1000 \mathrm{~ms}^{-1}$. The number of following statements which is/are true about the...
JEE Main Chemistry Medium
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