Hahnium

Hahnium (symbol Ha) is a chemical element, atomic number 104 on the periodic table. Because conclusions regarding this element's properties were advanced years later in the Soviet Union, an alternate name "Dubnium" (Db) was adopted.

Characteristics and history
Hahnium, in its most stable form, has an atomic mass of 260. Hahnium was discovered by Humans on Earth's North American continent for the first time by scientists working in the United States in the year 1970.