sodium has how many electrons in its outermost principal energy level?
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Sodium has 11 electrons. The first two fill the innermost energy level. The second energy level is also full, holding eight electrons and one electron remaining in the outer energy level. It is the number of outer electrons that give an element its chemical properties.
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Valence electrons occupy the outermost shell or highest energy level of an atom while core electrons are those occupying the innermost shell or lowest energy levels.
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Neon's outermost shell has 8 electrons. Neon therefore has 8 valence electrons. The shells of an atom can only hold so many electrons.
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The element sodium is made up of all atoms with 11 protons. How many protons, electrons, and neutrons are in a sodium-23 atom? Since all sodium atoms have 11 protons, this one has 11 protons. This tells us that it also has 11 electrons.
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Potassium atoms have 19 electrons and 19 protons with one valence electron in the outer shell. Potassium is considered chemically similar to sodium, the alkali metal above it on the periodic table.
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The Outermost Level These electrons are called valence electrons, and they determine many of the properties of an atom. An atom is most stable if its outermost energy level contains as many electrons as it can hold. For example, helium has two electrons, both in the first energy level.
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Therefore the sodium electron configuration will be 1s22s22p63s1. The configuration notation provides an easy way for scientists to write and communicate how electrons are arranged around the nucleus of an atom.
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The answer is 8 valence electrons. The valence electrons are those in the outermost shell, i.e. theshell with the highest principal quantum number n.
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Outside the nucleus, four energy levels are needed to hold the 28 negatively charged electrons. The electron configuration of Nickel is Na 2, 8, 16, 2 where 2 electrons are present in the shell closest to the nucleus, 8 in the second closest, 16 in third and 2 in the outer shell, better known as the valence shell.
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The first principal energy level contains only an s sublevel; therefore, it can hold a maximum of two electrons. Each principal energy level above the first contains one s orbital and three p orbitals. A set of three p orbitals, called the p sublevel, can hold a maximum of six electrons.
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The fifth energy level contains: 5s (which holds 2 electrons), 5p (which holds 6), 5d (holds 10), and 5f (holds 14) for a total of 32 electrons. After that, the fifth, sixth, and seventh energy levels also have four sublevels each. 6.
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Group 2A elements are the alkaline earth metals and all have two electrons in the outermost energy level because their electron configuration ends in s2.
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Sodium chloride (NaCl) is a typical ionic compound. The picture below shows both a sodium and a chlorine ion. Sodium has 1 electron in its outermost shell, and chlorine has 7 electrons. It is easiest for sodium to lose its electron and form a +1 ion, and for chlorine to gain an electron, forming a -1 ion.
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Na is sodium. Na has 11 (+) protons and 11 (-) electrons. Cl is chlorine. Cl has 17 (+) protons and 17 (-) electrons.
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A principal energy level may contain up to 2n2 electrons, with n being the number of each level. The first energy level can contain 2(1)2 or two electrons; the second can contain up to 2(2)2 or eight electrons; the third can contain up to 2(3)2 or 18 electrons, and so on.
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Mass number We know that the atomic number of sodium is 11. This tells us that sodium has 11 protons and because it is neutral it has 11 electrons.
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Answer. There are 10 electrons present in Na+. The atom of sodium has 11 electrons, 11 protons along with 12 neutrons, but Na+ contains one less electron, 11 protons along with 12 neutrons, as the ion has lost 1 electron.