Non-metals form convalent compounds with each other because thwy have similar electronegativity valuetrue or false ?

true

nonmetals all have relatively close electronegativity values because that are further to the right of the periodic table and have valence electron shells that are only missing 1-4 electrons as opposed to metals 6-7. these close electronegativity values force the atoms to share their electrons rather than just allowing one to give it to another.

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.

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