How many neutrons and protons are there in the following nuclei ?
C, SO, 22 Mg, 56Fe, Sr
O
Write the complete symbol for the atom with the given atomic number (2) and
atomic mass (A)
Z = 17, A = 35.
(ii) Z = 92 , A = 233.
(iii) Z = 4, A = 9.
Yellow light emitted from a sodium lamp has a wavelength (a) of 580 nm. Calculate
the frequency (v) and wavenumber (ū) of the yellow light.
Find energy of each of the photons which
(i) correspond to light of frequency 3x10 Hz.
(ii) have wavelength of 0.50 A.
Calculate the wavelength, frequency and wavenumber of a light wave whose period
is 2.0 x 10-10 s.
What is the number of photons of light with a wavelength of 4000 pm that provid
1J of energy?
A photon of wavelength 4 x 10'm strikes on metal surface, the work function
the metal being 2.13 eV. Calculate (i) the energy of the photon (eV), (ii) the kinet
energy of the emission, and (iii) the velocity of the photoelectro
(1 eV= 1.6020 x 10-'9J).
crinient to ionise
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Write the complete symbol for the atom with the given atomic number (Z) and atomic mass (A). (i) Z = 17 , A = 35 (ii) Z = 92 , A = 233 (iii) Z ...
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(i) The atom with atomic number 17 and mass number 35 is chlorine. Its complete symbol is 1735Cl .(ii) The atom with atomic number 92 and mass number ... More
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