Respuesta :
The correct option is A.
Sodium has an atomic number of 11 and it has only one electron in its outermost shell. For an atom to be stable, it must have eight electrons in its outermost shell. Thus, the reactivity of sodium is due to the fact that it does not have a full valence shell; because of this, it will be very willing to react with suitable elements in order to become stable.
Sodium has an atomic number of 11 and it has only one electron in its outermost shell. For an atom to be stable, it must have eight electrons in its outermost shell. Thus, the reactivity of sodium is due to the fact that it does not have a full valence shell; because of this, it will be very willing to react with suitable elements in order to become stable.
Sodium is extremely reactive,and it never occurs in the free state.A neutral sodium atom contains 11 protons and 11 electrons.,and it is very reactive because it doesnt have a full valence shell.By removing an electron from this atom we get a positively charged na + ion that has a net charge of +1.