Multiple choice general knowledge science & technology The reason a granite block is mostly empty space because the atoms in granite are held together by electrical forces invisible mostly empty space themselves not as close together Reveal answer Fill a bubble to check yourself C Correct answer Explanation Atoms are mostly empty space because the nucleus is tiny compared to the overall size of the atom, with electrons occupying the vast empty space around it. Since granite is made of atoms, and atoms are mostly empty space, granite is too.