20 partidle hack was Rutherford assistant, who became the first person observed
ID: 1772055 • Letter: 2
Question
20 partidle hack was Rutherford assistant, who became the first person observed alpha a JJ. Thompson, b) H. Wells, c) F.Soddy, d) J. Marsden, e) N. Bohr. scattering from a gold foil. 21. In 1911, when Rutherford observed alpha particles being scattered at back angles from a gold foil, he reached the conclusion that a) alpha c) the plum-pudding model of the atom must be wrong. d) gold has a much higher atomic number than previously thought particles are helium nuclei, b) alpha particles are very tightly bound, 22. After Rutherford's discovery of the nucleus, Bohr developed a model of the atom in which the nucleus was positively charged, surrounded by electrons. In this model, the chemical propertied of the atom were determine by a) the exact mass of the nucleus, b) the configuration of the electrons, c) the interactions taking place inside the nucleus, d) the radioactive properties of the atom Niels Bohr also hypothesizes that the position of an element on the periodic table was determine by a) the exact mass of the nucleus, b) the radioactive half-life of the atom, c) the number of positive charges on the nucleus, d) the exact size of the atom 23. 24 Moseley's work in1913 established Bohr's model of the nuclear atom by showing that resulting from the bombardment of an element by electrons was directly related to the atomic number of the element. a) the emission of fluorescence, b) the energy of alpha particles, b) the energy of alpha particles, c) the intensity of light, d) the frequency of x-rays 25. The World War I started in a) 1912, b) 1913, c) 1914, d) 1915Explanation / Answer
(20) answer "d" is correct. J. Marsden
(21) answer "c" is correct, as plum pudding model cannon explain the bouncing back of alpha particles from gopd foil.
(22) "b" is correct
(23)"c" is correct
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.