The lewis dot model of a molecule is shown. a visual diagram of a pcl3 molecule is shown. phosphorous is the central atom with a horizontal line connecting to each of the three chlorine atoms around it. phosphorous has a pair of dots on it. each of the three chlorine atoms have a pair of three dots on it. based on the model, which of the following is true?
( a. the electronegativity difference between phosphorous and chlorine is greater than 1.7.
( b. each chlorine has three non-bonded pairs and one bonded pair of electrons.
( c. phosphorous has three non-bonded pairs and one bonded pair of electrons.
( d. phosphorous has three valence electrons in the outermost energy level.

The answer is B. Each chlorine has three non-bonded pairs and one bonded pair of electrons.

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b. Each chlorine has three non-bonded pairs and one bonded pair of electrons.

Explanation:

Chlorine has three valance electrons. Each Cl atom forms a single covalent bond with the central P atom by sharing a pair of electrons. After forming a single covalent bond each Cl atom is left with six electrons that do not participate in any bond formation or there are three pairs of lone electrons.

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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.