osmium and iridium
who introduced the first Periodic Table
At the lower right corner of the Periodic Table.
The heaviest element in the periodic table (known in March 2013) is ununoctium.
Osmium
The heaviest atom known today is 294Uuo, an isotope of ununoctium.
This element is francium.
Out of the first 18 elements on the periodic table, 10 are solid
This number you see next to the name on the periodic table is called the atomic number. It is ordered from lightest to heaviest, judging of the weight of an element's specific atom.
Referring to the Periodic Table, it is Radon (Rn), atomic number 86 (the heaviest being ununoctium)
Metal is located throughout the periodic table. The periodic table is based on atomic weight. Metals range from some of the lightest to the heaviest of elements.
Uub and Uuq are listed on most periodic tables as the heaviest elements. (You can check the number at the bottom of the box, that is its atomic mass or weight
Ununhexium is the heaviest metal in the periodic table of elements. It is man made however, so it might not count. The heaviest natural metal might be Radium.