There are 0.501 moles in 60.66g of CF2Cl2
In the physical properties, it is mentioned that the element has 4 valence electrons. The elements in the periodic table are arranged such that, the number of valence electrons present in the neutral atoms belonging to a particular group is equal to the group number.
Thus, the unidentified element can be best classified as a nonmetal in period 4
Ans C)
Answer:
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Explanation:
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Properties change within a Row (or period) as the number of valence electrons in the outer shell increase