Centrifugal forces are balanced in atom by__________________?

Related Mcqs:

1. Distance at which attractive forces of hydrogen overcome repulsive forces is __________ ?

   A. 75.2pm
   B. 75.3pm
   C. 75.5pm
   D. 75.4pm

   Submitted by: Rashid Mehmood

2. The balanced chemical equation for the reaction which occurs when Be is added to water is____________?

   A. Be+2H2O?Be (OH)2+H2
   B. Be+H2O?Be (OH)2+H2
   C. Be+H2O?[Be (OH)4]+2+H2
   D. no reaction

3. The maximum amount of product obtained by balanced chemical equation is called as __________?

   A. Practical yield
   B. Theoretical yield
   C. Actual yield
   D. NOT

   Submitted by: Aamir khan Hullio

4. All of the following were theorized by Bohr in his description of the atom except__________________?

   A. Angular momentum of electrons in multiples of h/2?
   B. Electrons revolve in discrete circular orbits
   C. Energy of each electron is directly proportional to n2
   D. Electrons radiate energy continuously in a given orbit.

5. When an atom absorbs energy the lines in the spectrum will appear which are_________________?

   A. Brighter
   B. Darker
   C. Colourless
   D. Hard to locate

6. Splitting of spectral lines when atom is subjected to magnetic field is called _______________?

   A. Zeemans effect
   B. Starks effect
   C. Photo electric effect
   D. Compton effect

7. 2nd orbit is ___________ away from nucleus of H-atom as compared to 1st orbit is ?

   A. 2-times
   B. 3-times
   C. 4-times
   D. 6 times

8. Atom with higher atomic number produces X-rays of__________________?

   A. Shorter wavelength
   B. Larger wavelength
   C. X-ray not produced
   D. All are possible

9. Atom cannot be divided into simple unitstheorized by________________?

   A. Rutherford
   B. Dalton
   C. Bohr
   D. Schrodinger

10. The number of fundamental particles in an atom of the lightest isotope carbon are_______________?

    A. 6
    B. 12
    C. 18
    D. 20