In which of the following transitions is the largest quantum of energy liberated by an hydrogen atom when the electron changes energy levels? [n is the quantum number]
A. n = 2 to n = 1 B. n = 1 to n = 2 C. n = 2 to n = 3 D. n = 3 to n = 2 Correct Answer: Option B B. n = 1 to n = 2Absorption line spectra exhibited by atoms is a result of?
A. change in the kinetic energy of a moving atom B. instability of the nucleons C. excitation of an electron in the atom D. transition of an electron from a higher to a lower energy level Correct Answer: Option D D. transition of an electron from a higher to a lower...A material of mass 1.0 x 10‾²kg undergoes a fission process which decreases its mass by 0.02 percent. Calculate the amount of energy released in the process. (c = 3.0 x 108ms‾¹)
A. 1.8 x 10²ºJ B. 1.8 x 10¹³J C. 1.8 x 10¹¹J D. 1.8 x 10¹ºJ Correct Answer: Option D D. 1.8 x 10¹ºJThe half life of a radioactive substance is 14 days. If 48g of this substance is stored, after how many days will 1.5g of the original substance remain?
A. 84 days B. 70 days C. 56 days D. 40 days Correct Answer: Option B B. 70 daysProducts
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