Calcium has a full 4s sublevel, but does not have a full "outer shell", per se, because it is not a noble gas.
The outer shell of calcium has two electrons.
There are 2 electrons in valence shell of calcium. :-)
The key to "happiness" for an atom is a full outer electron shell. (The outer electron shell is called the valence shell.) There are two conditions that cause a shell not to be full. Either it has only an electron or two (or three) in the outer electron shell or it's short an electron or two in that outer shell. The direct answer to the question is that if an element is chemically active, its outer electron shell is incomplete or is not full.
It has a full outer shell of electrons
the outer shell - which 'wants' to be full.
The outer shell of calcium has two electrons.
False - calcium forms ionic bonds very easily because it has only 2 electrons in its outer shell
CaS Because Calcium has 2 electrons in its outer shell- so it needs to get rid of those (Ca2+) Sulfur has 6 electrons in its outer shell- so it needs 2 more to have a full outer shell (S2-)
Helium
Calcium has two electrons in the outer shell.
There are 2 electrons in valence shell of calcium. :-)
Helium
Helium (He) has 2 electrons in its outer shell. Calcium (Ca) has 2 electrons in its inner shell and 8 electrons in its outer shell.
Helium
no it only has 1 electron in the outer shell
The key to "happiness" for an atom is a full outer electron shell. (The outer electron shell is called the valence shell.) There are two conditions that cause a shell not to be full. Either it has only an electron or two (or three) in the outer electron shell or it's short an electron or two in that outer shell. The direct answer to the question is that if an element is chemically active, its outer electron shell is incomplete or is not full.
the outer cell will burn up leaving calcium-oxide