Question

Question 11 1 pts Which of the following experimental results suggested that the nuclear model on the right is a better presentation of the atomic structure over the raisin-pudding model on the left? Thomson proposed that small, negative electrons are embedded in a sphere of positive charge. Alpha Sphere of positive charge Atoms of the same element can have different masses, due to the difference in the numbers of neutrons in the nudeus. Millikan's oil experiment determined that the fundamental unit of charge was 1.60 x10-19C. . During Rutherford's gold foil experiment (the first nuclear experiment) some alpha particles were deflected by large angles. The charge to mass ratio of an electron is 176e11 C/kg. Question 12 1 pts Monochromatic light strikes a metal surface and electrons are ejected from the metal. If the intensity of the light is increased, what will happen to the ejection rate and maximum energy of the electrons? same ejection rate; same maximum energy greater ejection rate; same maximum energy greater ejection rate; greater maximum energy same ejection rate greater maximum energy

Answer 1

11. Option (a) Atoms of the same element can have different masses, due to the difference in the number of neutrons in the nucleus.

12. Option (b) greater ejection rate and same maximum energy.

Because when we increase the intensity of monochromatic light then only ejection rate increases no effect on energy happen.