Chemistry

Chemistry, 20.11.2019 05:31, asialuv

An alpha particle has the same composition as a helium nucleus.

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Physics, 02.07.2019 23:40, ptrlvn01

In 1911, ernest rutherford and his assistants geiger and marsden conducted an experiment in which they scattered alpha particles (nuclei of helium atoms) from thin sheets of gold. an alpha particle, having charge +2e and mass 6.64 ✕ 10−27 kg, is a product of certain radioactive decays. the results of the experiment led rutherford to the idea that most of an atom's mass is in a very small nucleus, with electrons in orbit around it. assume an alpha particle, initially very far from a stationary gold nucleus, is fired with a velocity of 2.70 107 m/s directly toward the nucleus (charge +79e). what is the smallest distance between the alpha particle and the nucleus before the alpha particle reverses direction? assume the gold nucleus remains stationary.

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Physics, 29.08.2019 21:30, korrinevbrulz8682

all large radioactive atoms decay into smaller atoms by releasing alpha particles. each alpha particle has 2 protons, 2 neutrons, and 0 electrons. the table below describes several neutral, low-mass atoms. an alpha particle is also referred to as a nucleus of which isotope? lithium-7 helium-4 hydrogen-2 helium-2

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Chemistry, 14.11.2019 23:31, 19cmulett

when radioactive uranium decays to produce thorium, it also emits a particle. as seen in the balanced nuclear equation, this particle can best be described as a) a helium atom. b) an alpha particle or a helium atom. c) a beta particle or a hydrogen nucleus. d) an alpha particle or a helium nucleus.

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Physics, 15.11.2019 01:31, alicia432

An alpha particle (α), which is the same as a helium-4 nucleus, is momentarily at rest in a region of space occupied by an electric field. the particle then begins to move. find the speed of the alpha particle after it has moved through a potential difference of −3.45×10⁻³ v . the charge and the mass of an alpha particle are α = 3.20×10⁻¹⁹ c and mα = 6.68×10⁻²⁷ kg , respectively.

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An alpha particle has the same composition as a helium nucleus.

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