Which of the following is not true about one mole

Which of the following is a conclusion that resulted from ernest rutherford’s scattering experiment? (will mark brainliest) a. the nucleus is negatively charged b. the atom is a dense solid and is indivisible c. the mass is conserved when atoms react chemically d. the nucleus is very small and the atom is mostly empty space

What does an electron configuration for an atom relate to the atoms placement on the periodic table

What is calcium oxide+diphosphorus pentoxide--> calcium phosphate balanced