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No; not if it is an ion. A chlorine atom, for example, has 17 protons and 17 electrons, but a chlorine ion (like when it is in sodium chloride, which is table salt) has 17 protons and 18 electrons. So, if you see an element with 18 electrons, it could be a chlorine ion, an argon atom, or a potassium ion.
An Oxygen atom would never contain 10 electrons on its own. It would have a maximum of 8 electrons at one time, unless the "oxygen atom" you are referring to is in fact an oxygen ION, in which case the charge would be -2. However, an oxygen ion can never be "by itself". It must be bonded with either itself as a diatomic or with another element as a compound.
It isn't an atom, it would actually be a stable Fluorine Ion with a -1 charge.
The Magnesium atom will lose 2 of its electrons to become a Magnesium ion with 10 electrons. (Mg2+) How many electrons does a magnesium ion have? How many electrons does a fluoride ion have? How many electrons does a fluoride ion have?
This is not an atom. This is an ion. This is Na+ ion.
There are 9 electrons in the atom without a charge, . The Fluorine ion (F -), has 10 electrons.
A sodium atom has 11 electrons so the total charge of all the electrons in a sodium ion is -10.
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Sodium ion is Na+. That means it has lost 1 of its electron from the valence shell to make it more stable.The number of protons of an atom or its ion will always be the same because if the number of proton changes the atom will also change. number of protons in Na+ is 11 number of electrons in Na+ is 10 (since it lost its 1 electron to be happy and stable)
No; not if it is an ion. A chlorine atom, for example, has 17 protons and 17 electrons, but a chlorine ion (like when it is in sodium chloride, which is table salt) has 17 protons and 18 electrons. So, if you see an element with 18 electrons, it could be a chlorine ion, an argon atom, or a potassium ion.
Most probably 10 electrons as a phosphide ion with 3-charge has 8 valence electrons.
Three electrons more than the Nitrogen atom, hence then -3 charge.
13 in the neutral atom, 10 in the Al3+ ion
The # of Valance electrons in the oxygen famly is 6