This is the noble gases familiy.
Where there are 8 electrons in the outer shell so a full shell. Elements are reactive when they need to lose or gain an electron. The noble gases are unreactive as they have a full outer shell.
Normally, when elements react they do so to attain a full outer shell, which is stable. Helium already has a full outer shell and so does need to not react to attain one.
Atoms often form ions by losing or gaining enough electrons to end up with a full outer shell. How many electrons are in a full outer shell for most atoms? Don't know? How about Googling full outer shell?
the alkali metals have 1 electron in their outer most shell. in order to obtain a full outer shell they have to lose this electron. so when they react with another metal they lose this electron and the outer most shell.
Beacause it has a full outer shell so is stable and unreactive
Argon has three full shells of electrons. Elements react to form bonds so that their outer shell is full. As Argon has a full outer shell it is unreactive
aluminum
Where there are 8 electrons in the outer shell so a full shell. Elements are reactive when they need to lose or gain an electron. The noble gases are unreactive as they have a full outer shell.
Normally, when elements react they do so to attain a full outer shell, which is stable. Helium already has a full outer shell and so does need to not react to attain one.
Elements have a number of electrons in their outer shell of the atom, all elements want to have a full shell and usually form with other atoms to do so. However, Xenon is a noble gas and already has a full outer shell and so does not combine with other elements unless it is made to do so.
No reactive elements always have partially filled shells- never full outer shells. Because they are partially filled they are less stable and want to react. If they had full shells they would be very stable.
Atoms often form ions by losing or gaining enough electrons to end up with a full outer shell. How many electrons are in a full outer shell for most atoms? Don't know? How about Googling full outer shell?
They are all in the same Group VIII. Thus they all have the same # of electrons in their outer shell; which is full. Since the outer shell (valence shell) is full, they are all unreactive compared to other elements.
Because the outer shell of electrons is full.
the alkali metals have 1 electron in their outer most shell. in order to obtain a full outer shell they have to lose this electron. so when they react with another metal they lose this electron and the outer most shell.
Beacause it has a full outer shell so is stable and unreactive
The halogens, column 17.