For the Paschen series the values of n1 and n2 in the expression
n1= 1, n2 = 2, 3, 4, ...
n1= 2, n2 = 3, 4, 5,...
n1= 3, n2 = 4,5,6,...
n1= 4, n2 = 5,6,7,...
In Sommerfeld's modification of Bohr's theory, the trajectory of an electron in a hydrogen atom is
a perfect ellipse
a closed ellipse-like curve, narrower at the perihelion position and flatter at the aphelion position
a closed loop on spherical surface
a rosette
If a species has 16 protons, 18 electrons and 16 neutrons, find the species and its charge.
S1-
Si2-
P3-
S2-
The orbital angular momentum of an electron in 2s orbital is
zero
B.
zero
The number of electron and neturons of an element is 18 and 20 respectively. Its mass number is
2
17
37
38
Wave nature of electrons was demonstrated by :
Schrodinger
de-Broglie
Davisson and Garmer
Heisenberg
4d, 5p, 5f and 6p orbitals are arranged in the order of decreasing energy. The correct option is:
6p > 5f > 5p > 4d
6p > 5f > 4d > 5p
5f > 6p > 4d > 5p
5f > 6p > 5p > 4d