Electromagnetic Radiation of Wavelength 242 Nm is Just Sufficient to Ionise The Sodium Atom. Calculate the Ionisation Energy of Sodium in Kj Mol - Chemistry

Advertisements
Advertisements
Numerical

Electromagnetic radiation of wavelength 242 nm is just sufficient to ionise the sodium atom. Calculate the ionisation energy of sodium in kJ mol–1.

Advertisements

Solution

Energy of sodium (E) = `("N"_"A""hc")/lambda`

=`((6.023xx10^23 "mol"^(-1))(6.626xx10^(-34) "Js")(3xx10^8 "ms"^(-1)))/(242xx10^(-9))`

= 4.947 × 105 J mol–1

= 494.7 × 103 J mol–1

= 494 kJ mol–1

Concept: Atomic Model
  Is there an error in this question or solution?
Chapter 2: Structure of Atom - EXERCISES [Page 69]

APPEARS IN

NCERT Chemistry Part 1 and 2 Class 11
Chapter 2 Structure of Atom
EXERCISES | Q 2.10 | Page 69

Video TutorialsVIEW ALL [1]

Share
Notifications



      Forgot password?
Use app×