Atom is neutral because ……
a) neutrons = electrons
b) electrons = protons
c) neutron = protons
d) all of these
Explanation:Electrons carry negative charge and protons positive so these charges are canceled out.
According to Rutherford’s model most of the volume occupied by the atom is ……..
a) empty
b) positively charged
c) filled
d) negatively charged
According to Rutherford’s model the nucleus is very ……… as compared to size of atom.
a) large
b) vast
c) small
d) none of these
Explanation:As the number of particles were passed through to find the space empty.
By Rutherford, the attractive force of nucleus on electrons provide …… to electron.
a) centrifugal force
b) centripetal force
c) frictional force
d) normal force
Explanation:Centripetal force is force that keeps a body to move in a circle having formula mv2/r.
By Rutherford’s model, electrons revolving around the nucleus would require ………
a) frictional force
b) centrifugal force
c) centripetal force
d) normal force
…..is responsible for mass and energy of the atom.
a) nucleus
b) electrons
c) protons
d) all of these
Explanation:In the case of nuclei, the binding energy is so great that it accounts for a significant amount of mass.The actual mass is always less than the sum of the individual masses of the constituent protons and neutrons because energy is removed when the
nucleus is formed.
