Which of the following is the best name for CaF2?
2 answers:
Answer : The correct option is Calcium difluoride.
Explanation :
<u>Naming of ionic compound :</u>
- Name the cation first and then anion.
- Name the anion by using suffix (-ide).
- The net charge in the ionic compound must be zero.
As compound contains one calcium atom and 2 fluorine atoms.
Therefore, the name of ionic compound is Calcium difluoride.
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Alkaline earth metal are the elements present in II group in the periodic table and are known as 'Metals' and have a charge of +2.
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Halogens - F, Cl, Br, I, At
When Alkaline earth metal (metals) combine with Halogens (non-metals) the compound formed will be ionic compound and the formula of the compound will be based on the charges of the element.
When we write the formula of the ionic compound the charges of the elements get criss crossed.
For example - Mg (Alkaline earth metal) have a charge of +2 and Cl (Halogen) have a charge of -1 and when they combine to form the formula their charges get criss crossed and we will get or
When an alkaline earth metal, A, reacts with a halogen, X, the formula of the Ionic compound formed should be
