Advertisements
Advertisements
प्रश्न
Electromagnetic radiation of wavelength 242 nm is just sufficient to ionise the sodium atom. Calculate the ionisation energy of sodium in kJ mol–1.
संख्यात्मक
उत्तर
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
shaalaa.com
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
APPEARS IN
संबंधित प्रश्न
The diameter of zinc atom is 2.6 Å. Calculate
- radius of zinc atom in pm and
- number of atoms present in a length of 1.6 cm if the zinc atoms are arranged side by side length-wise.
State the atomic number and mass number of \[\ce{^23_11Na}\] and draw its atomic model.
What is nucleus of an atom? Compare its size with that of the atom. Name its constituents. How is the number of these constituents determined by the atomic number and mass number of the atom?
