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Question
An element with atomic number ______ will form a basic oxide.
Options
7 (2, 5)
17 (2, 8, 7)
14 (2, 8, 4)
11 (2, 8, 1)
Solution
An element with atomic number 11 (2, 8, 1) will form a basic oxide.
Explanation:
Metals form basic oxides with 1 to 3 electrons in their outermost shell, whereas nonmetals form acidic oxides with 4 to 8 electrons in their outermost shell. As a result, metal (Na) with atomic number 11 (electronic configuration 2, 8, 1) will produce basic oxide.
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