Each chemical element has an atomic number and a mass number. the atomic number refers to the number of element has, while the mass number refers to the number of the element has.

What is the chemical formula of the following compound

What problem would a person have if the nucleic acid in one of his or her cells were damaged?

Each pair of clay balls represents to planetesimals if each plane test molluscum pound of the same material and is separated by the same distance which pair experiences the greatest gravitational attraction