Перекласти речення. 1.It was John Dalton who gave hydrogen an atomic weight of 1 as it is the lightest element. 2.E. Rutherford discovered that radium gave off three different types of rays: alpha-, beta- and gramma- rays. 3. ...

Перекласти речення. 1.It was John Dalton who gave hydrogen an atomic weight of 1 as it is the lightest element. 2.E. Rutherford discovered that radium gave off three different types of rays: alpha-, beta- and gramma- rays. 3. One should be careful when working with chemical substances.