Work function ( {W}_{\circ} ) values of six metals (in {eV} ) are given below: Li Mg Cu Ag K Na 2.42 3.7 4.8 4.3 2.25 2.3 How many of the above metals do not eject the electrons when they are made to strike with radiation of wavelength 400 {\nm} ? ( {\h}=6.62 \times 10^{-34} {\Js})

AP EAPCET 07-Jul-2022 Shift 2 Paper

Section: Chemistry

Question : 121 of 160

Marks: +1, -0

Work function (W∘ ) values of six metals (in eV ) are given below:

Li	Mg	Cu	Ag	K	Na
2.42	3.7	4.8	4.3	2.25	2.3

How many of the above metals do not eject the electrons when they are made to strike with radiation of wavelength 400‌nm ?
(h=6.62×10−34‌Js)

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