Today (June 2013) the periodic table contain 118 chemical elements, natural or artificial.
The periodic table has 7 periods on it.
118 elements
7
Each element on the periodic table has a specific number of neutrons and will vary for its isotope.
The periodic table of Mendeleev has 18 groups and 7 periods.
Today 94 elements (1 to 94) are considered natural chemical elements.
There are 117 elements in the periodic table. Elements 1-116 and element 118. IMPROVED ANSWER --------------------------------------------------------------------------------------- 118, but element 117 is so unstable they do not officially count it as being an element on the periodic table yet.
Many people do to determine which element is in a substance ex: me, scientists
The element with 50 protons on the periodic table is tin, which has the atomic number 50.
The number of protons is the atomic number of the element.
The largest atom is francium and has 87 protons and 87 electrons.