which sequence represents a correct order of historical developments leading to the modern model of the atom?
the atom is a hard sphere – most of the atom is empty space - electrons exist in orbitals outside the nucleus
the atom is a hard sphere - electrons exist in orbitals outside the nucleus - most of the atom is empty space
2
most of the atom is empty space - electrons exist in orbitals outside the nucleus - the atom is a hard sphere
most of the atom is empty space
the atom is a hard sphere - electrons exist in orbitals outside the nucleus