When elements with four electrons in the outermost shell react chemically ,they

A. Always gain 4 electrons
B. Always lose 4 electrons
C. May lose, gain, or share 4 electrons
D. May lose or gain 4 electrons

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.

particle   p is an electron and particle q is a neutron

the answer is c

tell me if wrong

it’s previous models   because when i picked that son of a gun’s answer it was wrong look for previous models because they might make it a different letter