Identify the element in Period 3 that reacts with oxygen to form an ionic compound represented by X in the formula X2O.
Question
Identify the element in Period 3 that reacts with oxygen to form an ionic compound represented by X in the formula X2O.
Solution
To identify the element in Period 3 that reacts with oxygen to form an ionic compound represented by X in the formula X2O, we need to look at the periodic table.
Period 3 of the periodic table includes the elements sodium (Na), magnesium (Mg), aluminum (Al), silicon (Si), phosphorus (P), sulfur (S), chlorine (Cl), and argon (Ar).
Out of these elements, the one that reacts with oxygen to form an ionic compound is sodium (Na). Sodium reacts with oxygen to form sodium oxide (Na2O), which is an ionic compound. Therefore, the element represented by X in the formula X2O is sodium (Na).
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