how many valence electrons sodium?
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Sodium has one valence electron. Valence electrons are electrons found in the outermost shell of an atom. The shell number representing the valence shell will differ depending on the atom in question. For sodium, which is in the 3rd row of the periodic table, the valence electrons will be found in the 3rd shell.
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Answer and Explanation: Radon has 8 valence electrons.
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A: An atom of a group 17 element such as chlorine has seven valence electrons. It is “eager” to gain an extra electron to fill its outer energy level and gain stability. Group 16 elements with six valence electrons are almost as reactive for the same reason.
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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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The Group 2 atoms have 2 valence electrons. The Group 3 atoms have 3 valence electrons. The Group 4 atoms have 4 valence electrons. The Group 5 atoms have 5 valence electrons.
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Group 2A elements have 2 valence electrons. Group 3A elements have 3 valence electrons.
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So sodium has 11 protons and 11 electrons. The mass number is 23. The number of neutrons = mass number – atomic number. The number of neutrons = 23 – 11 = 12.
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Since electrons have a negative charge, gaining electrons makes the ion negative. Losing electrons makes the ion positive. If you need to determine how many electrons are in the sodium ion Na+, start with the neutral atom. Neutral sodium has 11 electrons.
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A: Any element in group 1 has just one valence electron. Examples include hydrogen (H), lithium (Li), and sodium (Na). Any element in group 18 has eight valence electrons (except for helium, which has a total of just two electrons). Examples include neon (Ne), argon (Ar), and krypton (Kr).
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The third "shell" is a bit more complicated but let's just say that it takes up to 8 electrons as well (for now...). So, sodium's 11 electrons are arranged this way: 2 electrons in the first "shell", 8 electrons in the second "shell"; and 1 electron (the valence electron) in the third "shell".
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The number of valence electrons is the number of electrons in the outer shell, that the atom uses for bonding. Nitrogen has 5 electrons in its n=2 (outer) shell. There is a quick way of identifying the number of valence electrons - it is the same as the Group number (not for d-block elements, though).
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After determining how many valence electrons there are in NO2-, place them around the central atom to complete the octets. There are a total of 18 valence electrons for the Lewis structure for NO2-.
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We have 14 valence electrons for Br2. We'll put two between atoms to form a chemical bond.
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It has 6 valence electrons. A 2− charge indicates that the atom has gained 2 electrons.
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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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The number of valence electrons corresponds to the group number the element is in. In the case of potassium, it is a group 1 element and is part of the alkali metals. This means that potassium will have 1 valence electron.
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Neutral sodium has 11 electrons. To achieve a single positive charge, the neutral atom must lose one electron. The net result is that the sodium ion Na+ has 10 electrons.