1
JEE Main 2022 (Online) 25th June Morning Shift
Numerical
+4
-1

The longest wavelength of light that can be used for the ionisation of lithium atom (Li) in its ground state is x $$\times$$ 10$$-$$8 m. The value of x is ___________. (Nearest Integer).

(Given : Energy of the electron in the first shell of the hydrogen atom is $$-$$2.2 $$\times$$ 10$$-$$18 J ; h = 6.63 $$\times$$ 10$$-$$34 Js and c = 3 $$\times$$ 108 ms$$-$$1)

2
JEE Main 2021 (Online) 1st September Evening Shift
Numerical
+4
-1
A 50 watt bulb emits monochromatic red light of wavelength of 795 nm. The number of photons emitted per second by the bulb is x $$\times$$ 1020. The value of x is __________. [Given : h = 6.63 $$\times$$ 10$$-$$34 Js and c = 3.0 $$\times$$ 108 ms$$-$$1]
3
JEE Main 2021 (Online) 31st August Evening Shift
Numerical
+4
-1
The value of magnetic quantum number of the outermost electron of Zn+ ion is ______________.
4
JEE Main 2021 (Online) 31st August Morning Shift
Numerical
+4
-1
Ge(Z = 32) in its ground state electronic configuration has x completely filled orbitals with ml = 0. The value of x is ___________.
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