how many electrons in their outermost shells?
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Most of the elements important in biology need eight electrons in their outermost shell in order to be stable, and this rule of thumb is known as the octet rule.
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Cobalt (Co) has an atomic number of 27, which means it has 27 electrons and protons. Shells hold up to two electrons in the first and eight electrons in the outer shells.
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The shell closest to the nucleus, 1n, can hold two electrons, while the next shell, 2n, can hold eight, and the third shell, 3n, can hold up to eighteen. The number of electrons in the outermost shell of a particular atom determines its reactivity, or tendency to form chemical bonds with other atoms.
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The electrons that occupy the outer most shell of an atom are called valence electrons. They are important because they determine how an atom will react.
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Group 18 elements (helium, neon, and argon are shown) have a full outer, or valence, shell. A full valence shell is the most stable electron configuration. Elements in other groups have partially-filled valence shells and gain or lose electrons to achieve a stable electron configuration.
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There is 1 electron in the outermost shell of caesium. As it is placed in group 1 and all the group 1 elements like hydrogen,lithium,rubidium have 1 electron in their outermost shell.
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Each chlorine atom has seven electrons in its outer most shell. Each chlorine needs one more electron to gain a full outer shell and be stable. The chlorine on the left needs to share one electron to the chlorine on the right and the chlorine on the right needs to share one electron to the chlorine on the left.
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A sulfur atom has 6 electrons in the outer electron shell.
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So we get 2 + 5 = 7. So fluorine has 7 electrons in the outermost shell.
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Most of the elements important in biology need eight electrons in their outermost shell in order to be stable, and this rule of thumb is known as the octet rule. Some atoms can be stable with an octet even though their valence shell is the 3n shell, which can hold up to 18 electrons.
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Question: How Many Electrons Are In The Outermost Shell Of The Ga+3 Ion In Its Ground State? the Correct Answer Is 18, But I Thought That It Was 8. Please Explan In The Simpliest Explanation Of Why This Answer Is 18. Thanks.
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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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Fluorine (F) and chlorine (Cl), as group 17 elements, have seven electrons in their outermost shells. They tend to achieve a stable octet by taking an electron from other atoms, becoming negatively charged ions: F− and Cl−. Carbon (C), as a group 14 element, has four electrons in its outer shell.
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The innermost shell has a maximum of two electrons but the next two electron shells can each have a maximum of eight electrons.
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In general, atoms are most stable, least reactive, when their outermost electron shell is full. Most of the elements important in biology need eight electrons in their outermost shell in order to be stable, and this rule of thumb is known as the octet rule.
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Valence electrons are the electrons present in the outermost shell of an atom. You can easily determine the number of valence electrons an atom can have by looking at its Group in the periodic table. For example, atoms in Groups 1 and 2 have 1 and 2 valence electrons, respectively.
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Electrons located in the outermost shell of the electron cloud are called “valence electrons” and have the highest energy. Valence electrons determine the chemical properties of an element, or how the valence electrons of one element are shared or traded with valence electrons of other elements to create new molecules.