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Among the following element group number is not equal to valence electrons- (1)Na (2)N (3)Ne (4)None?
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Among the following element group number is not equal to valence elect...
Explanation:
The group number of an element is the same as the number of valence electrons it has in its outermost shell. This is because the group number refers to the number of electrons in the highest energy level of an atom, which is also known as the valence shell. However, there are some exceptions to this rule, which are explained below.
Exceptions:
The group number of an element is the same as the number of valence electrons it has in its outermost shell. This is because the group number refers to the number of electrons in the highest energy level of an atom, which is also known as the valence shell. However, there are some exceptions to this rule, which are explained below.
Exceptions:
- Sodium (Na): Sodium belongs to group 1, which means it should have 1 valence electron. However, in reality, sodium has only 1 electron in its outermost shell, which means it has only 1 valence electron.
- Nitrogen (N): Nitrogen belongs to group 5, which means it should have 5 valence electrons. However, in reality, nitrogen has only 3 electrons in its outermost shell, which means it has only 3 valence electrons.
- Neon (Ne): Neon belongs to group 18, which means it should have 8 valence electrons. In reality, neon has exactly 8 electrons in its outermost shell, which means it has 8 valence electrons. Neon is an exception in that it follows the general rule.
- None: There are no other elements that do not follow the general rule. All other elements have group numbers equal to the number of valence electrons they have.
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Among the following element group number is not equal to valence elect...
None
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Among the following element group number is not equal to valence electrons- (1)Na (2)N (3)Ne (4)None?
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