C) covalency in CaH2 and electrovalency in C2H2 why the phosphorous form pentahalide even in the absence of 'd' orbital? en Español. From Wordnik.com. [Yahoo! Answers: Latest Questions] Reference
A) electrovalency in CaH2 and covalency in C2H2. From Wordnik.com. [Yahoo! Answers: Latest Questions] Reference
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