The scientist who introduced elliptical orbit is ____________.
Bohr
Schrondinger
Zeeman
Sommerfeld
Ionisation energy depends on nuclear charge, charge on the ion and ___________.
shape of the orbitals
spin of the electron
size of the atom
none of these
The mass of the atom is mostly due to its ____________.
Electrons
Nucleus
Protons only
Neutrons only
Which of the following fundamental particles is not deflected by a magnetic field?
Protons
Neutrons
Positron
Which of the following statements is not true?
Most of the space in an atom is empty
The total number of neutrons and protons is always equal in a neutral atom
The total number of electrons and protons in an atom is always equal
The total number of electrons in any energy level can be calculated by the formula 2n2.
The distribution of electrons in various subshells of the outermost shell is called
inner shell configuration
valence shell configuration
inner shell conformation
valence shell conformation
__________ can be obtained from discharge tube experiment.
Ionization energy
Atomic size
Electron affinity
Electronegativity
Bohr atomic model can explain the spectrum of _________.
the hydrogen atom only
the hydrogen and hydrogenic species
the hydrogen molecule
only atoms of all elements
The shape of s - orbital is ___________.
dumb bell
spherical
octahedral
tetrahedral
The concept of light quantum was introduced by ___________ .
Ernest Rutherford
Max Planck
Neils Bohr
Sommerfield