According to _______________ atomic theory atoms are divisible and destructible
Modern
Elemental
Dalton's
Basic
Carbon has ________________ isotopes.
1
4
6
3
________________ proposed a theory of atom known as the atomic theory.
Democritus
John Dalton
Rutherford
Joseph Priestly
_____________________ is the electronic configuration of nitrogen atom.
2,5
2,4,1
2,3,3
3,4
_______________ discovered that cathode rays have kinetic energy and raise the temperature of a metallic object on which they fall.
Goldsteirn
William crooke
Sir J.J thomson
According to _______________ atomic theory atoms are neither created nor destroyed.
Boyle's
Charals's
Bohr's
_________________ discovered electrons
Mendeleev
Sir J.J Thomson
Goldstein
____________________ discovered cathode rays.
J J Thomson
_______________ loses two electrons from its valence shell forming a cation.
Nitrogen
Oxygen
Calcium
Aluminium
According to _______________ atomic theory,matter consists of small indivisible particles called atoms.
Rutherford.
Bohr.
Dalton.
Boyle.