Here you can read more about the chemical element Dubnium. Its shemical symbol is Db and its atomic number is 105. The relative atomic mass of Dubnium is 268 u. The elemental classification of Dubnium is Transition metals, and it belongs to group 5 and period 7 in the Periodic Table of Elements.
Dubnium was discovered in the year 1968 by Joint Institute for Nuclear Research.
To the right (or below if you are using a mobile device with a smaller screen) you will find the information given above for the element Dubnium ordered in tabular form, which might be easier to read and use if you want to quantify it in some sort.