it gains 4
it has gain 4 electrons
loses 2 electrons to form a calcium ion with 2+ charge
Firstly, an atom is uncharged by definition. If it is charged, that is it has gained or lost electrons, its name is changed to an ion. The atomic number is the number of protons of an atom of that element. And the number of protons is equal to the number of electrons.
An ion is an atom with a positive (+) or negative (-) charge. This is because the atom has a different amount of electrons than its number of protons (aka atomic number).
There are many factors when it comes to Boron. If it were to form an Ion, then it would drop a total of three electrons.
it has gain 4 electrons
+1
80
Chlorine gain electrons.
In a redox reaction the number of electrons lost by one particle is equal to the number of electrons gained by another particle.
Number of electrons are lost by an atom in a chemichl reaction
Often there are the same number of electrons as there are protons. Exceptions to this are called ions, which have gained or lost an electron (can't be a proton lost or gained, that would change the element).
Silicon has the atomic no. of 14 and has 4 electrons in its outermost shell. Thus,in order to make bonds it must loose or gain 4 electrons in order to achieve stable configuration but this process requires lot of energy. Therefore, silicon mostly makes bonds by sharing its electrons.
Aluminium will lose 3 electrons to form Al3+ ions.
The charge an element would have if it lost or gained electrons
It is called Oxidation number.
The oxidation number of an ionic atom or molecule is the number electrons that it has lost or gained.