Carbon-12 and carbon-13 areisotopes of carbon. which of the following statements is correct? they both have seven protons in the nucleus. they both have the same mass numberthey both have seven neutrons in the nucleus. they both have the same atomic number

Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

Which of the following elements would you expect to have the lowest ionization energy value? fluorine, lithium, neon, nitrogen

Select all of the statements which are true. electrons are located in shells or orbits around the atom. electrons orbit slowly around the atom. electrons travel in one flat path around the nucleus of an atom. the valence of an atom is determined by the number of electrons in the atom's outermost shell.