how many electrons are there 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.
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Valence electrons are the number of electrons present in the outermost shell of an atom. Now, the last shell of chlorine atom has 7 electrons in it. Therefore, there are 7 valence electrons present in an chlorine 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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Label each shell as n=1, n=2, etc. The first shell holds 2 electrons. We have 18 electrons left.
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The electrons in the highest numbered subshells are the valence electrons, which comprise the valence shell of the atom. For brevity, many chemists record the electron configuration of an atom by giving only its outermost subshell, like 4 s 1 for potassium or 4 s 2 for calcium.
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The halogen atoms carry seven valence electrons in their outermost electron shell. These seven outermost electrons are in two different kinds of orbitals, designated s (with two electrons) and p (with five).
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Answer Expert Verified Then, the number outer-shell d electrons is 4.
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Copper has two electrons in the innermost shell, eight in the next shell, eighteen in the third shell, and one in the fourth shell. This means that the first three shells each have as many electrons as they can hold, and the fourth shell has one lonely electron. (The fourth shell can hold up to 32 electrons.)
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The number of valence electrons are equal to the number of electrons in the outermost shell of the atom. The atomic number of sulphur is 16, and therefore the sulphur atom has 16 electrons in its orbits. The first shell can have a maximum of 2 electrons, and the second shell a maximum of 8 electrons.
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Oxygen has 6 electrons in outermost orbit. where 2s22p4 is outermost electronic configuration. S orbital (2s2)→2 electrons. P orbital (2p4)→4 electrons.
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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. ... This outermost shell is known as the valence shell, and the electrons found in it are called valence electrons.
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Whereas all other group 8 elements have two electrons in the outermost shell, in ruthenium, the outermost shell has only one electron (the final electron is in a lower shell). This anomaly is observed in the neighboring metals niobium (41), molybdenum (42), and rhodium (45).
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Each shell can contain only a fixed number of electrons: The first shell can hold up to two electrons, the second shell can hold up to eight (2 + 6) electrons, the third shell can hold up to 18 (2 + 6 + 10) and so on. The general formula is that the nth shell can in principle hold up to 2(n2) electrons.
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Every element in the first column (group one) has one electron in its outer shell. Every element in the second column (group two) has two electrons in the outer shell. As you keep counting the columns, you'll know how many electrons are in the outer shell.
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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 Group 7 elements - fluorine (F), chlorine (Cl), bromine (Br), iodine (I) and astatine (At) - have seven electrons in the outer shell.
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Noble gases have eight electrons in their outermost shell, except in the case of helium, which has two.