Dmitri Mendeleev
Table of the Elements was created in 1993.
false
Cobalt has 27 protons, 27 electrons, and typically 32 neutrons.
The letters are called Symbols. They represent elements on periodic table.
Dmitri Mendeleev is credited with creating the first widely accepted periodic table of elements in 1869. He arranged the elements according to their atomic mass and properties, predicting the properties of missing elements and leaving gaps for future discoveries.
If you are a Creationist the answer is God, if not then the answer is they just exist. or scientists found them and put it into the periotic table. Scientists may have discovered them, they certainly didn't invent them, and I think you mean the periodic table of elements.
noble gases
Table of the Elements was created in 1993.
false
false
Phosphorus's symbol on the periodic table is P.
October 22, 1997
hydrogen
Cobalt has 27 protons, 27 electrons, and typically 32 neutrons.
63
Periodic table is generally credited to Russian chemist Dmitri Mendeleev.
The amount of electrons, neutrons, and protons it has in it, Also the spot of the element on the periotic table (medal, gass etc.)