Nitrogen atom has an atomic number of 7 and oxygen has an atomic number 8. The total number of electrons in a nitrate ion will be
8
16
32
64
The nucleus of helium contains
Four protons
Four neutrons
Two neutrons and two protons
Four protons and two electrons
30
32
34
42
A sodium cation has different number of electrons from
25
26
22
19
NO
Iso-electronic species is
The nitride ion in lithium nitride is composed of
7 protons + 10 electrons
10 protons + 10 electrons
7 protons + 7 protons
10 protons + 7 electrons
The (-particle scattering experiment of Rutherford concluded that
The nucleus is made up of protons and neutrons
The number of electrons is exactly equal to number of protons in atom
The positive charge of the atom is concentrated in a very small space
Electrons occupy discrete energy levels
The average distance of an electron in an atom from its nucleus is of the order of