A molecule of silane has one silicon atom bonded with hydrogen atoms. Silicon has four valence electrons. How many hydrogen atoms are needed to form a stable molecule?Group of answer choices4312
Question
A molecule of silane has one silicon atom bonded with hydrogen atoms. Silicon has four valence electrons. How many hydrogen atoms are needed to form a stable molecule?Group of answer choices4312
Solution
Silicon has four valence electrons. In order to form a stable molecule, it needs to fill its valence shell, which requires eight electrons. This means it needs four more electrons.
Hydrogen has one electron and needs two to fill its valence shell and become stable. Therefore, it can share one electron with another atom in a covalent bond.
Since silicon needs four more electrons and hydrogen can share one, four hydrogen atoms are needed to form a stable molecule with one silicon atom. So, the answer is 4.
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