Explain the formation of CaCl2 by the transfer of electron between metal and Non- metal.
Answers
Answer:
calcium has 20 electrons which can be written as 2,8,8,2. Thus Calcium has 2 valence electrons which it wants to give away to attain octet by having 8 electrons in its outermost orbit.
Chlorine has 17 electrons which can be written as 2,8,7. Thus Chlorine has 7 valence electrons and it wants to add one more electron in its outermost orbit to attain octet by having 8 electrons in its outermost orbit.
In Calcium Chloride molecule, there is one calcium atom and two chlorine atoms. Each Chlorine atom wants one more electron to complete its octet. So, two chlorine atoms will need two more electrons to complete their octet.
Thus, we see that, Calcium wants to give away two electrons, whereas the two Chlorine atoms want to add two more electrons. Thus they both fulfill their octet when Calcium transfers its two valence electrons to the two Chlorine atoms. Thereby, Calcium attains +2 charge and each Chlorine atom attains −1 charge and an ionic bond is formed between the atoms.
An ionic bond is formed in a molecule when one atom in the molecule transfers its one or more electrons from itself to its neighboring atom in the molecule.
In this molecule, calcium transfers its two electrons to its two neighboring chlorine atoms and hence CaCl