Structure of an atom over the year:
Who discovered/proposed solid sphere model of an atom?
a) John Dalton
b) J. J. Thomson
c) Ernest Rutherford
d) Niel Bohr
Explanation:The Solid Sphere model is an atomic model proposed
by John Dalton in 1803. It states that all objects are made of particles
called atoms and that they are solid spheres that cannot be divided further
into smaller particles. This is similar to the model made by the Greeks in the
fifth century BCE.
When
John Dalton proposed the solid sphere model of an atom?
a) 1803
b)
1904
c)
1911
d)
1913
Who
discovered/proposed the plum pudding model of an atom?
a) John Dalton
b) J. J. Thomson
c) Ernest Rutherford
d) Niel Bohr
Explanation:The plum pudding model (also known as Thomson's plum pudding model) is a historical scientific models of the atom. The plum pudding model is defined by electrons surrounded by a volume of positive charge, like negatively-charged “plums” embedded in a positively-charged “pudding” (hence the name).
When
J.J. Thomson proposed the plum pudding model of an atom?
a) 1803
b) 1904
c)
1911
d) 1913
Who discovered/proposed nuclear model of an atom?
a) John Dalton
b) J. J. Thomson
c) Ernest Rutherford
d) Niel Bohr
Explanation:Rutherford's atomic model became known as the nuclear model. In the nuclear atom, the protons and neutrons, which comprise nearly all of the mass of the atom, are located in the nucleus at the center of the atom. The electrons are distributed around the nucleus and occupy most of the volume of the atom.
