Chemistry

Chemistry, 24.09.2019 20:50, dondre54

Describe how neutrons were discovered

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Chemistry, 05.07.2019 18:30, uticabadgirl

Using the methods allowed by 10 cfr 20, calculate the neutron dose received by a worker who has been exposed to a uniform field of: 2x106 neutrons cm-2 at 1 ev 6x106 neutrons cm-2 at 10 ev 7x106 neutrons cm-2 at 100 ev 6x106 neutrons cm-2 at 1000 ev 5x106 neutrons cm-2 at 10 kev 3x106 neutrons cm-2 at 100 kev 4x106 neutrons cm-2 at 1 mev 2x106 neutrons cm-2 at 2.5 mev 1x106 neutrons cm-2 at 5 mev how does that compare to a dose from the same total number of neutrons from an unknown energy?

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Chemistry, 10.07.2019 09:00, nnnnnhamilton7572

Neutrons were discovered in 1932, more than 10 years after the existence of isotopes was confirmed. what property of electrons and protons led to their discovery? suggest a possible reason why neutrons were the last of the three classic subatomic particles to be discovered.

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Chemistry, 25.07.2019 08:40, aa985960

Which of the following is correct concerning subatomic particles? a) the electron was discovered by goldstein in 1886. b) the neutron was discovered by chadwick in 1932. c) the proton was discovered by thomson in 1880. d) cathode rays were found to be made of protons. how many neutrons and protons does a neutral atom of sodium with an atomic mass number of 23 have? a) 22 neutrons; 11 protons b) 23 neutrons; 11 protons c) 11 neutrons; 11 protons d) 12 neutrons; 11 protons

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Chemistry, 05.11.2019 12:31, brooke1897

15 did henry moseley affect the development of the periodic table? a. he discovered that the number of valence electrons increase to a full octet. b. he discovered that groups of elements have similar properties. c. he discovered that neutrons affect an element's atomic mass. d. he discovered that each element has its own atomic number.

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