A binary covalent compound

In your post please include the following:

Write the formula of a binary covalent compound
Write the formula of a binary covalent compound
Write the formula of a binary covalent compound
For example, I would write in my post:

Hi,

CH4
NH3
BH3
reply to at least one of your peer's posts. In each reply, please do the following:

Write the molecular and electronic geometry of one of the molecules, and determine its polarity.

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