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To find the atomic mass of a particular atom you need to know what?
number of protons. To find the atomic mass of a particular atom you need to know the number of protons.
Expert answered|smp0784|Points 4131|
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Asked 8/27/2013 6:53:16 PM
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If Bohr said there are two electrons in the first shell then how many electrons would there be in the first shell of an atom according to the modern atomic theory?
Weegy: In chemistry and atomic physics, an electron shell, also called a principle energy level[by whom ] may be thought of as an orbit followed by electrons around an atom's nucleus. [ The closest shell to the nucleus is called the "1 shell" (also called "K shell"), followed by the "2 shell" (or "L shell"), then the "3 shell" (or "M shell"), and so on farther and farther from the nucleus. The shells correspond with the principal quantum numbers (1, 2, 3, 4...) or are labeled alphabetically with letters used in the X-ray notation (K, L, M, …). Each shell can contain only a fixed number of electrons: The 1st shell can hold up to two electrons, the 2nd shell can hold up to eight (2 + 6) electrons, the 3rd shell can hold up to 18 (2 + 6 + 10), and the 4th shell can hold up to 32 (2 + 6 + 10 + 14) and so on. Since electrons are electrically attracted to the nucleus, an atom's electrons will generally occupy outer shells only if the more inner shells have already been completely filled by other electrons. However, this is not a strict requirement: Atoms may have two or even three incomplete outer shells. (See Madelung rule for more details.) For an explanation of why electrons exist in these shells see electron configuration.[1] The electrons in the outermost occupied shell (or shells) determine the chemical properties of the atom; it is called the valence shell. Each shell consists of one or more subshells, and each subshell consists of one or more atomic orbitals. ] (More)
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Expert Answered
Asked 8/25/2013 3:22:13 PM
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Niels Bohr proposed his model of the atom about ________ years ago.
Weegy: Niels Bohr proposed his model of the atom about: the spectrum of the hydrogen atom in 1913 years ago. Niels Bohr, [ proposed a model for the hydrogen atom that was consistent with Rutherford's model and yet also explained the spectrum of the hydrogen atom. ] (More)
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Asked 8/25/2013 3:44:28 PM
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An electron enters __________ when it has absorbed energy and moved to a higher energy level.
Weegy: Base in my school years when negative and positive electron attract it make an energy which makes things move. (More)
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Asked 8/25/2013 4:19:24 PM
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which scientist used the information to hypothesize that an atom must be made of a tiny dense nucleus surrounded by a region of mostly empty space. Which scientist did this? Democritus John Dalton Neils Bohr Ernest Rutherford
Weegy: ERNEST RUTHERFORD used the information to hypothesize that an atom must be made of a tiny dense nucleus surrounded by a region of mostly empty space. (More)
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Asked 8/25/2013 5:11:42 PM
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