Short answer:
It will have to gain three electrons to obtain a stable octet in its valence shell.
The answer if you're actually looking to understand:
Since the Atomic Number of Phosphorus is 15, that means that in its stable state it has 15 electrons. The first orbital will thus hold 2 electrons and the second will hold 8, both at the maximum capacity. That is a total of 10 electrons. As mentioned before, Phosphorus has 15 electrons, and so it has 5 electrons in its valence shell. The capacity of the third orbital is 8 electrons. Therefore, in order to fill the valence, Phosphorus would either have to lose its five valence electrons or pick up three. Since it will preferentially pick up the three before losing five, it will thus have to gain three electrons. (If you're looking to understand why it will pick up three rather than lose five, look up "ionization energy" and "electron affinity"
Sulfur has 6 valence electrons. To achieve 8 valence electrons, sulfur must gain 2 electrons to fill its outer shell and satisfy the octet rule.
all the elemants have valence electrons the last number of the elecotrons is the elemets valence electrons
Bromine's atomic number is 35, so it has 7 valence electrons. To achieve 8 valence electrons and a full outer shell, bromine needs to gain one electron.
Sulfur must gain two electrons.
It loses 2 electrons to obtain the argon configuration of 8 valence electrons.
Phosphorus, with 5 valence electrons, needs to gain 3 electrons to have a full set of 8 valence electrons. This would allow it to achieve a stable octet configuration, resembling the noble gas configuration of argon.
Phosphorus wants to gain three electrons to have 8 valence electrons.
Sulfur has 6 valence electrons. To achieve 8 valence electrons, sulfur must gain 2 electrons to fill its outer shell and satisfy the octet rule.
Phosphorus wants to gain three electrons to have 8 valence electrons.
They will gain 3 electrons from something with 3 valence electrons.
Aluminum would lose 3 electrons to become like argon. Argon has a full valence shell with 8 electrons, so aluminum, with 3 valence electrons, would need to lose these electrons to achieve a full valence shell configuration similar to argon.
In a reaction u need two valence electrons to gain or share two valence electrons.
it is in the oxygen family and has 6 valence electrons it requires 2 electrons
It'll have to gain one to have a stable octet.
all the elemants have valence electrons the last number of the elecotrons is the elemets valence electrons
Bromine's atomic number is 35, so it has 7 valence electrons. To achieve 8 valence electrons and a full outer shell, bromine needs to gain one electron.
the electrons on their outer shell, all atoms want to gain a full valence shell.