Easy
Element $X$ forms a chloride with the formula $XCl_2$,which is a solid with a high melting point. $X$ would most likely be in the same group of the Periodic Table as
- A$Na$
- B$Al$
- C$Si$
- D$Mg$
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$(a)$ three elements that have a single electron in their outermost shells.
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$(c)$ three elements with filled outermost shells.
$(a)$ three elements that have a single electron in their outermost shells.
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