SrCl2 is an ionic compound because when the metal combines with nonmetal, it usually forms an ionic compound. Here, Sr (strontium) is a metal and Cl (chlorine) is a nonmetal. So when they combine, it forms an ionic compound.
Well, now you have got to know that SrCl2 is an ionic compound, but let me explain the in-depth reason why SrCl2 is an ionic compound.
Why is SrCl2 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 SrCl2, the Sr atom is a metal and the Cl atom is a nonmetal.
Hence the bond between them is an ionic bond.
How does the ionic bond form between Sr and Cl?
In SrCl2, there are two atoms;
Sr and Cl.
About Strontium (Sr):
Strontium atom have 38 electrons.
The electrons arrangement in Strontium (Sr) is 2, 8, 18, 8, 2.
So the outermost orbit of Strontium atom has 2 electrons.
Now Strontium is a metal and the metals are highly electropositive (that means they have the tendency to lose electrons and become positive ions.)
Hence during the chemical reaction, the Strontium atom will lose 2 electrons to form a stable octet.
About Chlorine (Cl):
Chlorine atom have 17 electrons.
The electrons arrangement in Chlorine (Cl) is 2, 8, 7.
So the outermost orbit of Chlorine atom has 7 electrons.
Now Chlorine is a nonmetal and the nonmetals are highly electronegative (that means they have the tendency to gain electrons and become negative ions.)
Hence during the chemical reaction, the Chlorine atom will gain 1 electron to form a stable octet.
What happens when Sr and Cl combine?
When Sr and Cl combine with each other, the electron transfer takes place from Strontium atom to Chlorine atom (i.e from Sr to Cl).
In other words, the Strontium atom (Sr) loses 2 electrons and the Chlorine atoms (Cl) gains 1-1 electrons.
Due to this, the Strontium becomes a positive ion (Sr2+) and Chlorine becomes a negative ion (Cl–).
Now because of the positive charge of Strontium ion and negative charge of Chlorine ion, the electrostatic force of attraction is produced between them.
This electrostatic force between Strontium ion and Chlorine ions results in an ionic bond between them.
Hence, SrCl2 is an ionic compound.
I hope you have understood the reason why SrCl2 is an ionic compound.
Check out other compounds to see whether they are ionic or covalent;
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Is K2S Ionic or Covalent?
Is SF4 Ionic or Covalent?
Is Br2 Ionic or Covalent?
Is K3PO4 Ionic or Covalent?
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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