Which of the following metals requires the radiation of highest frequency to cause the emission of electrons ? (a) Na (b) Mg (c) K (d) Ca

 

  Question:  From NCERT  | NEET    || [Difficult level:Easy]  || 

Which of the following metals requires the radiation of
highest frequency to cause the emission of electrons ?
(a) Na 
(b) Mg
(c) K 
(d) Ca_

: 

(b) Mg

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NCERT REFERENCE

Consequently, the outermost electrons are held more and more tightly and the ionization enthalpy increases across a period.

The removal of the outermost electron requires less energy down a group.____________________

SUB-TOPIC:

• 3.7.1 Trends in Physical Properties
• (c) Ionization Enthalpy

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