chemical formulae 20 Criss cross method.
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Answer:
Hint: We know that chemical formulas can also be written using criss-cross method. In the criss-cross method, the numerical value of the ion charge of the two atoms are crossed over, which becomes the subscript of the other ion. Using this technique, we will write the chemical formula of the given compounds.
Complete step by step answer:
Let’s us discuss about the given compound as,
A.Magnesium chloride
We have to remember that the atomic number of Magnesium is 12 and has a valency of 2. It means it has two electrons in the outermost shell for bonding. The atomic number of chlorine is 17 and has 7 electrons in the outermost shell. It means it just needs one more atom for bonding. Hence, we will use atoms of chlorine to bond with one atom of magnesium.
We can apply the criss-cross method for this compound as,
Therefore, the chemical formula of magnesium chloride is MgCl2.
Explanation:
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