The surface of sodium metal is irradiated with radiation of wavelength x nm. The kinetic energy of ejected electrons is 2.8×10⁻²⁰ J. The work function of sodium is 2.3 eV. The value of x is _ _ _ ×10² nm. (Nearest integer) (Given: h=6.6×10⁻³⁴ J s; 1 eV =1.6×10⁻¹⁹ J; c=3.0×10⁸ m s ⁻¹)

Atomic Structure: JEE Main 2026 Chemistry question

JEE Main 2026 · 2 Apr, Evening shift · Q71

JEE Main 20262 Apr, Evening shiftChemistryMediumAtomic Structure113× since 2002

The surface of sodium metal is irradiated with radiation of wavelength

x

nm. The kinetic energy of ejected electrons is

2.8\times10^{-20}

J. The work function of sodium is 2.3 eV. The value of

x

is ______

\times10^2

nm. (Nearest integer) (Given :

h=6.6\times10^{-34}

J s; 1 eV

=1.6\times10^{-19}

c=3.0\times10^8

m s

^{-1}

)

Your answerType your answer. Integers and decimals are accepted.

JEE Main 2026 Atomic Structure Question with Solution (2 Apr Evening shift, Q71) | JEE Arc