Engineering, 19.02.2021 14:00 hdjsjfjruejchhehd

Someone please help me and explain this in detail Element X has three electrons in its outermost orbit.
Element Y has seven electrons in its outermost orbit.

What is the chemical formula of the ionic compound formed by these elements when they react together? (Use X and Y as the chemical symbols.)

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Someone please help me and explain this in detail Element X has three electrons in its outermost or...