__________ is defined as the minimum energy required to remove an electron from the outermost orbital of an atom in gaseous state.
Electron affinity
Electron negativity
Electrostatic energy
Ionization energy
The atomic mass of an element is expressed in terms of _____________ .
grams
joules
ergs
a.m.u
Nitrogen has three unpaired electrons. It obeys ______________ .
Aufbau Principle
Hund's rule
Pauli's rule
Heisenberg's rule
The splitting of atomic spectral lines in the presence of an external magnetic field is
Twitter ion
Quantum effect
Photoelectric effect
The Zeeman effect
1Ao= _____________.
10-2cm
10-6cm
10-8cm
10-3cm
The Planck's constant is a unit of :
work
energy
angular momentum
linear momentum
An atom has mass number 23 and atomic number 11. The atom has _________, electrons, ______ protons and _________ neutrons.
11,12, 13
11,11,12
11,11,13
11,14,15
The unit of Ionization energy, eV is equivalent to ____________.
K.J.mole
K.mole-1
K.N. mole
K.J.mole-1
Bohr's model violates the rules of classical physics because it assumes that:
all electrons have same charge
the nuclei have same charge
electrons can revolve around the nucleus
charged particles can be accelerate without emitting radiation.
For which of the following species, Bohr's theory does not apply?
H
H+
He+
Li2+
