Acalcium atom tends to lose two electrons to become a calcium ion, while a chlorine atom tends to gain one electron to become a chloride ion. given this information, write out the chemical formula for the compound calcium chloride.

CaCl2.

Explanation:

Ions may be defined as the elements that acquires positive or negative charge over them. Two main types of ions are cations and the anions that are formed by the gain or loss of the element.

The calcium has two positive charge over it and contains Ca²+. The chloride contains one negative charge over it and exists as .

The chemical formula will be :

Ca²+     .

+2               -1  (cross multiply)

CaCl2.

Thus, the formula is CaCl2.

The formula for the calcium chloride compound would be CaCl2.

Calcium in its neutral state has no charge but when it loses two electrons, it becomes calcium ion ()

Chlorine atom, also in its neutral state, has no charge. When it  gains one electron, it becomes chloride ion ()

When both calcium and chloride ions interact in a chemical reaction, the  donates the two electrons to two chloride ions. Each of the two chloride ions gains 1 electron from the calcium ion. Thus, a neutral   is formed

+ ---->

Because the bond between the calcium ion and the two chloride ions is formed through the donation of electrons by the calcium ion,  is said to be an ionic compound.

More on chemical formula can be found here:

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