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1
JEE Main 2021 (Online) 17th March Evening Shift
Numerical
+4
-1
In the ground state of atomic Fe(Z = 26), the spin-only magnetic moment is ____________ $$\times$$ 10$$-$$1 BM. (Round off to the Nearest Integer). [Given : $$\sqrt 3 $$ = 1.73, $$\sqrt 2 $$ = 1.41 ]
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2
JEE Main 2021 (Online) 17th March Morning Shift
Numerical
+4
-1
A certain orbital has n = 4 and mL = $$-$$3. The number of radial nodes in this orbital is ____________. (Round off to the Nearest Integer).
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3
JEE Main 2021 (Online) 16th March Evening Shift
Numerical
+4
-1
The number of orbitals with n = 5, m1 = +2 is ___________. (Round off to the Nearest Integer).
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4
JEE Main 2021 (Online) 16th March Morning Shift
Numerical
+4
-1
When light of wavelength 248 nm falls on a metal of threshold energy 3.0 eV, the de-Broglie wavelength of emitted electrons is _______$$\mathop A\limits^o $$. (Round off to the Nearest Integer).

[ Use : $$\sqrt 3 $$ = 1.73, h = 6.63 $$\times$$ 10$$-$$34 Js

me = 9.1 $$\times$$ 10$$-$$31 kg; c = 3.0 $$\times$$ 108 ms$$-$$1; 1eV = 1.6 $$\times$$ 10$$-$$19 J]
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