how many valence electrons would an atom have to be stable?
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The octet rule refers to the tendency of atoms to prefer to have eight electrons in the valence shell. When atoms have fewer than eight electrons, they tend to react and form more stable compounds.
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Fluorine has seven valence electron, just one electron is needed to attain an octet or stable configuration. The implication of the above is that fluorine is very reactive, in fact it is the most reactive non metal, and as a result fluorine is not found in free state in nature.
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Atoms of elements in this group have four valence electrons.
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The number of bonds for a neutral atom is equal to the number of electrons in the full valence shell (2 or 8 electrons) minus the number of valence electrons. This method works because each covalent bond that an atom forms adds another electron to an atoms valence shell without changing its charge.
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Neon therefore has 8 valence electrons. The shells of an atom can only hold so many electrons. Each shell has a certain amount of subshells (s, p, d, etc) that have a certain amount of orbitals.
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The common examples of such elements are hydrogen (stable with only 2 valence electrons), beryllium (stable with only 4 valence electrons) and boron and aluminum (stable with only 6 valence electrons).
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The octet rule is the understanding that most atoms seek to gain stability in their outer most energy level by filling the s and p orbitals of the highest energy level with eight electrons.
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Answer and Explanation: A bromine (Br) atom has 7 valence electrons.
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The Group 1 atoms have 1 valence electron. The Group 2 atoms have 2 valence electrons. The Group 3 atoms have 3 valence electrons. The Group 4 atoms have 4 valence electrons.
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octet rule: Atoms lose, gain, or share electrons in order to have a full valence shell of eight electrons. Hydrogen is an exception because it can hold a maximum of two electrons in its valence level.
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Octets are particularly stable electron arrangements. Noble gases already have 8 valence electrons (except for helium) and are in very stable states. They have no need to gain or lose electrons, so they are "happy".
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Do ions have valency? - Quora. Ions can still have valence electrons. The more obvious ions are stable at a noble gas configuration, but there are often elements that can lose (or gain) different numbers of electrons in forming ions. For example magnesium can lose one or two electrons.
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Thus every atom in this stable molecule fulfills the octet rule. ... Nitrogen, the next nonmetal, has 5 electrons in the valence shell, so it needs to combine with 3 hydrogen atoms to fulfill the octet rule and form a stable compound called ammonia (NH3).
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Yes. Each element has a specific number of protons that make up it's identity. However, electron count and configuration can change to make bonds, in elemental form, etc. The main reason atoms change the number of electrons in the valence shell is to reach the octet or react with other atoms.
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It is the number of electrons an atom of an element can gain,lose or share. The valency of an atom is equal to the valence electrons, if it is 4 or less. If it is more than 4, the valency is equal to 8 minus the number of electrons in the outer shell. Example: Magnesium has electronic configuration 2,8,2.
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Valence: Valence is the ability of an atom to be combined with another atom. Valency: Valency is the maximum number of electrons that an atom can lose or gain in order to stabilize itself.
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Noble gases all have a complete octet (eight valence electrons), except for helium (which has only two electrons). Because this configuration is extremely stable as well as symmetrical, the noble gases are very unreactive.