Which of the following statements is true? which of the following statements is true? two electrons in the same orbital can have the same spin. it is possible for two electrons in the same atom to have identical values for all four quantum numbers. an orbital that penetrates into the region occupied by core electrons is more shielded from nuclear charge than an orbital that does not penetrate and therefore has a lower energy. an orbital that penetrates into the region occupied by core electrons is less shielded from nuclear charge than an orbital that does not penetrate and therefore has a lower energy. none of the above are true.