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Aluminum would have to gain five.
Sulfur will gain 2 electrons
They should gain 2 electrons to attain noble gas electronic configuration. (it doesn't become a noble gas as the number of protons are not same)
carbon has to gain or lose 4 electrons to gain noble gas configuration.
They have to gain 1 electron. Halogens have 7 electrons in their valence shell and noble gasses have 8.
Aluminum must lose 3 electrons to satisfy the octet rule. Once it does this, it becomes the Al+3 ion, and is isoelectronic with noble gas neon.
Aluminum would have to gain five.
Every element that isn't a noble gas, wants to become isoelectronic or have the same number of electrons as its nearest noble gas. This is because noble gases are very stable, while other elements aren't. Forming compounds allows elements to gain or lose electrons, which allows them to become like their nearest noble gas.
it should gain 3 electrons
Noble gases
nitrogen has 5 valence electrons. It should gain 3 electrons to achieve a noble gas configuration.
Se has to gain two electrons
Nitrogen has to gain three electrons
Sulfur will gain 2 electrons
It has 7 valence electrons, so needs 1 more to become noble.
loses 2 electrons to achieve a noble gas configuration
They should gain 2 electrons to attain noble gas electronic configuration. (it doesn't become a noble gas as the number of protons are not same)