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Which statement best explains why calcium and fluorine combine in a 1:2 ratio?
A. Calcium has one electron shell, and chlorine has two electron shells.
B. calcium has two valence electrons, and fluorine can accept one electron in its outer shell.
C. Fluorine's atomic number is twice calcium's atomic number.
D. Fluorine can accept twice as many electrons as calcium has in its outer shell.
Sagot :
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