There are no instructions? But I assume you are finding the element according to their atomic number since you’re given just a bunch of numbers and this is chemistry.
To do this, you can simply look on the periodic table, the atomic numbers are increasing from left to right.
80 is Hg, which is Mercury
29 is Cu, which is Copper
35 is Br, which is Bromine
2 is He, which is Helium
73 is Ta, which is Tantalum
Hope this helped!