CaCO3 (Calcium carbonate) is an ionic compound because it is formed by two ions, Ca2+ and CO32-. These positive and negative ions produce the force of attraction between them which results in an ionic bond.
Moreover when the metal combines with nonmetal, it usually forms an ionic compound. Here, Ca is a metal and CO3 is a group of nonmetals. So when they combine, it forms an ionic compound.
Well, now you have got to know that CaCO3 is an ionic compound, but let me explain the in-depth reason why CaCO3 is an ionic compound.
If you are a visual learner like me, then here is a short one minute video for you.
Why is CaCO3 an ionic compound?
As mentioned above, you can simply remember that when the metal combines with nonmetal, the bond between them is an ionic bond.
Here in CaCO3, the Ca atom is a metal and the CO3 is a group of nonmetals.
Hence the bond between them is an ionic bond.
But how does the ionic bond form between Ca and CO3?
When Ca and CO3 combine with each other, the electron transfer takes place from Ca to CO3.
In other words, Ca loses 2 electrons and the CO3 gains 2 electrons.
Due to this, the Calcium becomes a positive ion (Ca2+) and CO3 becomes a negative ion (CO3)2-.
Now because of the positive charge of Calcium ion and negative charge of CO3 ion, the electrostatic force of attraction is produced between them.
This electrostatic force between Ca ion and CO3 ion results in an ionic bond between them.
Hence, CaCO3 is an ionic compound.
I hope you have understood the reason why CaCO3 is an ionic compound.
Jay is an educator and has helped more than 100,000 students in their studies by providing simple and easy explanations on different science-related topics. With a desire to make learning accessible for everyone, he founded Knords Learning, an online learning platform that provides students with easily understandable explanations.
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