What is the driving force of energy that causes convections currents to occur?

What is avogadro’s number, and why is it useful

What rule is used to determine how many covalent bonds an element can form? a. the number of covalent bonds is equal to six c the number of covalent bonds is equal to five minus the group number plus the group number b. the number of covalent bonds is equal to eight d. none of the above minus the group number select the best answer from the choices provided

How do dying stars contribute to the formation of planets