Structure of Atom questions
799 published questions with worked solutions.
- Ionisation energy of He^+ is 19.6 10^ -18 Jatom^ -1 . The energy of the first stationary state (n = 1) of Li^ 2+ is
- Two atoms are said to be isobars, if
- Consider the following table: Particle | B | Relative charge | D | Mass/u | Approx. mass/u Electron | -1.6022 10^ -19 | -1 |...
- Cathode rays have same charge to mass ratio as
- An element E loses one and two -particles in three successive stages. The resulting element will be
- Mass number of an atom (A) is equal to
- ^ 14 _ 6 C and ^ 14 _ 7 N are the examples of
- Calculate the number of protons, neutrons and electrons in ^ 80 _ 35 Br .
- Rutherford's nuclear model of an atom is like a small scale solar system. Further coulombic force between electron and the...
- Major development(s) responsible for the formulation of Bohr's model of atom were
- Which of the following series of transitions in the spectrum of hydrogen atom fall in visible region?
- Which of the following relation correctly described all the lines in the hydrogen spectrum?
- The expression for Bohr's frequency rule is
- An electron can move only in those orbits for which its angular momentum is integral multiple of
- Energy of an electron is given by E = -2.178 10^ -18 J ( Z^2 n^2 ). Wavelength of light required to excite an electron in an...
- The ionisation enthalpy of hydrogen atom is 1.312 10^ 6 J ,mol^ -1 . The energy required to excite the electron in the atoms from...
- The energy of the electron in a hydrogen atom has a negative sign for hydrogen atom because
- The radius of the second Bohr orbit for hydrogen atom is (Planck's constant (h) = 6.6262 10^ -34 Js; mass of electron = 9.1091...
- The energy of an electron in first Bohr orbit of H-atom is -13.6 eV. Which of the following energy value(s) of excited state(s)...
- For emission line of atomic hydrogen from n_i = 8 to n_f = n, the plot of wave number ( ) against (1/n^2) will be (The Rydberg...
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