Rutherfordium is the first element in the series of d-transition elements in the seventh period of the Periodic Table. Knowledge of the chemical properties of rutherfordium, is the important step towards the understanding of the chemistry of transactinide element. R.J.Silva Rutherfordium is the first element in the series of d-transition elements in the seventh period of the Periodic Table. Knowledge of the chemical properties of rutherfordium, is the important step towards the understanding of the chemistry of transactinide element. R.J.Silva