Complete :

The total number of the orbitals which are filled with electrons in the two energy levels ( M+L ) of the atom of aragon ₁₈Ar is (a)   e^-

Complete :

The metal sheet used in Rutherford's experiment is lined with a layer of (a)  

Complete :

The number of half-filled orbitals in the element whose atomic number (42) = (a)  

Complete :

The Rutherford's atom has a complicated structure which resembles the (a)   system, since it's composed of a central nucleus (representing the sun), and the electrons revolve around it (representing the planets).

Complete :

G.R. The electron does not fall into the nucleus despite the attraction between them ?

Bec. the centrifugal force on the moving electron is (a)   in the magnitude (quantity) and opposite in direction to the attractive force between the nucleus and the electron.

Complete :

The number of orbitals of the principal level N equals (a)  

Complete :

Rutherford's theory had failed to explain the atomic structure. G.R.? Bec. it didn't explain the system in which (a)   revolve around the nucleus.

Complete :

What is the symbol of the principal level which contains s,p and d sublevels only

(a)  

Complete :

The number of electrons of an atom in a certain element containing first four full-filled sublevels and one half filled sublevel = (a)   e^-

Complete :

What is the maximium number of electrons required to saturate one orbital in 4f sublevel


(a)  

Complete :

What is the numer of the electrons which magnetic quantum number ml = 0 in cobalt (II) ion ₂₇Co²⁺ ?

(a)  

Complete :

When the electron in hydrogen atom transfers from 4d to 1s , the emitted photon is in the form of (a)   light