Write the nuclear equation for the alpha decay of Po-214.

Iodine has 37 known isotopes.  Therefore, the atomic mass has a range of 108-144 amu. Which of the following statements concerning iodine is correct? A) The isotopes of iodine have between 55 and 91 protons. B) An atom of iodine can have between 55 and 91 neutrons. C) The isotopes of iodine will always have the same number of neutrons, but the protons can vary. D) The isotopes of iodine have between 108 and 144 neutrons, but the number of protons will not vary.

Write the missing element in the following nuclear reactions. Include mass and atomic number. Type answer following this example: 237 U-237 Np + a. 73 Ga-73 Ge+ b. 192 Pt 188 Os+ C. 205 Bi-205 Pb+ (answer would be 92, 93, -Beta) d. 241Cm + 241 Am type your answer... type your answer... type your answer... type your answer....

The energy released from fission is about 200 MeV per fission event or 3.2-10-11 J per 235U nucleus. The fission of 1 g of 235U generates about 1 MW of thermal power; thus, a reactor that contains 1 kg of 235U fuel generates about 1 GW (109 W). If the reactor core is immersed in a heat bath containing 8.7.105 liters of water (12 m x 6 m x 12 m) initially at 25°C, how long will it take for the water to begin to boil off? Assume that the heat capacity of water is constant and that there is no heat lost from the reactor coolant to the surroundings.

A sample of helium is initially at 605 torr in a volume of 2.85 L. At 24.7 °C you found the density of He to be 0.130 g/L and the density of Ar to be 1.30 g/L even though both samples had the same number of moles. Which one of the following best explains why the densities are different? A B C D Argon is a heavier atom than helium, so it has more mass in the same volume occupied by the gas. Argon is a larger atom than helium so it occupies more volume. An argon atom is more dense than a helium atom. The densities are different only because of rounding.

Predict the approximate ratio peaks in the mass spectrum of 1,2-Dichloroethane at m/z values 98, 100, and 102.

What is the mass number of an ion with 107 electrons, 157 neutrons, and a +1 charge?