Which of the following is the correctly abbreviated si unit describing the mass of an object a. m b. mol c. kg d. m

If element x has 99 protons how many electrons does it have

Why does karst topography exist in some geographic location? a. few climates have enough oxygen b. most regions have rock layers other than limestone c. in most regions, the soil is too thin d. the water is too acidic enough in most places

How does the strength of the electrostatic force between an electron and a proton compare to the strength of the gravitational force between them?