Out of the first 92 elements, 1 being hydrogen (H) and 92 being uranium (U), there are 90 that are naturally occurring. Technetium (Tc) and promethium (Pm) are man-made elements and do not have any isotopes occurring naturally.
including "unknown elements" there are 59 elements in half of the periodic table, not including them there is 55.5 Added: 92 natural elements/2 = 46 natural elements make up 1/2 periodic table.
It's 118 chemical elements in the periodic table.
118 elements are in the periodic table of elements; some of them are still unnamed (January 2013).
Currently the Periodic Table lists 118 elements.
There are currently 118 elements in the periodic table.
including "unknown elements" there are 59 elements in half of the periodic table, not including them there is 55.5 Added: 92 natural elements/2 = 46 natural elements make up 1/2 periodic table.
there are precisely 118 elements on the periodic table.
90: The first 92 elements except technetium and promethium.
90: The first 92 elements except technetium and promethium.
92 elements occur naturally on the periodic table.
Today 94 elements (1 to 94) are considered natural chemical elements.
It's 118 chemical elements in the periodic table.
The Periodic Table has 118 elements and counting...
There are 38 transition elements in the periodic table.
118 elements are in the periodic table of elements; some of them are still unnamed (January 2013).
The periodic table of elements does not contain laws, only elements.
Today (June 2013) the periodic table contain 118 chemical elements, natural or artificial.