Rutherford and Soddy's research involved:deflection of alpha particles caused by positive nucleusdefining the components of atomic nucleithe theory that uranium successively disintegrated to leadnone of the aboveNEXT QUESTIONREAD NEXT SECTION

Describe the most important newunderstanding of the structure of theatom that Rutherford inferred from hisexperiment with alpha particles

1.Rutherford’s ‘alpha (α) particles scattering experiment’resulted into discovery of(a) electron (b) proton (c) nucleus in the atom (d) atomic mass.

In Rutherford's famous experiment, he shot heavy, fast moving, positive alpha particles at a thin gold foil. Based on Thomson's plum pudding model of the atom, what did Rutherford expect to happen, and why? All the alpha particles would be deflected by the foil because of the even distribution of mass and charge throughout the atom. All the alpha particles would pass straight through the foil because of the even distribution of mass and charge throughout the atom. Most of the alpha particles would become embedded in the foil because they are attracted to the negative electrons in the atom. Some of the alpha particles would be deflected and some would pass through because of the negative charge of the electron cloud.

In the early part of the 20th century, experiments were carried out in which alphaparticles were directed at thin sheets of metal.A few alpha particles were deviated through small angles and a very small proportionwere reflected back.(a) The diagram represents an alpha particle reflected back through 180° as itapproached the nucleus of a gold atom.path of alpha particle nucleus ofgold atomCalculate the maximum acceleration of the alpha particle as it reaches the point ofminimum separation from the nucleus. Assume that the gold nucleus remains at rest.speed of alpha particle = 1.74 × 107 m s−1mass of alpha particle = 6.64 × 10−27 kgatomic number of gold = 79

Rutherford expected alpha particle to travel almost straight through a target of gold foil. The results of his gold foil experiment did not supportGroup of answer choicesThomson’s plum pudding theoryMillikan’s oil drop experimentThe cathode ray phenomenonBohr’s atomic model