WILL GIVE BRANLIest NEED NOW Which two PARTICLES are present in the nucleus of an alom?
O Electrons and neutrons
O Electrons and molecules
O Protons and neutrons
O Protons and electrons

protons and neutrons

Explanation:

protons and neutrons are in the nucleus of an atom, while electrons circle around the nucleus.

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.

he would use the colour black