it changes because you 50 years in 2013 it will change you will see
No, because as the days and years go past, more scientists will find out more information on the periodic table. When they find out information on the periodic table, sometimes new elements are found, adding new elements on the periodic table causes it to change.
In more than 150 years the periodic table had many versions; hundred versions of this table are known. The sole official table is today the IUPAC Periodic Table.
Yes, the 92 naturally occurring elements will not change. The structure of an atom of any element wiil not change.
Copper has been mined for about 5,000 years so it's exact origin is unknown. Since copper was a known element at the time that Dimitri Mendeleev first laid out his periodic table in 1869, it was included in that first periodic table. Other elements that were unknown at the time, like helium, were not included.
yes, demetri did create the first periodic table but Henery Mosley updated it years later.
No, because as the days and years go past, more scientists will find out more information on the periodic table. When they find out information on the periodic table, sometimes new elements are found, adding new elements on the periodic table causes it to change.
In more than 150 years the periodic table had many versions; hundred versions of this table are known. The sole official table is today the IUPAC Periodic Table.
Yes, the 92 naturally occurring elements will not change. The structure of an atom of any element wiil not change.
Many modifications were done. Finally moseley's periodic table was accepted.
the oldest known element in periodic table is copper -8000 years old know element thank you
it toke 2 years
Copper has been mined for about 5,000 years so it's exact origin is unknown. Since copper was a known element at the time that Dimitri Mendeleev first laid out his periodic table in 1869, it was included in that first periodic table. Other elements that were unknown at the time, like helium, were not included.
Please, don't be ridiculous ! Chemistry is a science, the periodic table has a history of approx. 150 years; any link with any conspiration theory.
it is what scientists used to use years and years and years and years and years ago.
Radon is a noble gas (non-metal) in the periodic table so it appears in the atmosphere as radioactive gas with a quantity of about 0.01%. the standard state of Radon is gas in atmosphere so it is placed in periodic table as gas...the gas exist since billion of years and history of periodic table is thousands of years....
yes, demetri did create the first periodic table but Henery Mosley updated it years later.
Dmitri Mendeleev performed his research during the year 1847.