What is the IUPAC name of an element with atomic number 107.

The element with the atomic number 107 is Bohrium (Bh).

However, before being given the official name "Bohrium," elements with atomic numbers greater than 100 were temporarily named using a systematic naming method set by IUPAC (International Union of Pure and Applied Chemistry). This system uses a specific prefix for each digit of the atomic number, followed by the suffix "-ium" for all elements.

Systematic Naming Rule for Atomic Number 107:
"1" is represented by the prefix "un".
"0" is represented by the prefix "nil".
"7" is represented by the prefix "sept".
Putting it all together, the temporary IUPAC name for element 107 was Unnilseptium (symbol: Uns).

Official Name:
In 1997, IUPAC officially named the element Bohrium (Bh) in honor of the Danish physicist Niels Bohr.

Thus, the IUPAC name of the element with atomic number 107 is Bohrium (Bh).