How do oceanographers denfine salinity a. number of grams of mineral salt per liter b. number of grams of dissolved sulfur salt per kilogram of water c. number of milligrams of dissolved sodium chloride per milliliter of water d. number of grams of salt per kilogram of water

the atomic number will stay the same no matter how many electrons it has, so it doesn’t decrease nor increase. it’ll only change with a different number of protons

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.