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Which 9 elements are so old that we don't know when they were discovered -?
Wiki User
∙ 8y ago
sulfur californium iodine yttrium strontium radium tellurium vanadium
Ambrose Krajcik
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What is the difference between the new and old periodic table?
Well, Back when Medeleev made this table, many of the elements were not even discovered yet. He plotted only the elements that he knew on his table. He organized them by increasing atomic weight. He didn't know all the elements so he would put question marks and empty spaces in the spots he thought elements would be and left to be found by other scientist. He happened to be true about the missing elements and that scientist did end up finding these "missing links" of the periodic table and led to the new or modern periodic table. The modern periodic table doesnt have any missing elements and they changed Medeleev's way of organizing the table by increasing atomic weight to increasing atomic number. So the newer form of the periodic table was complete and made it easier to find what elements react better with other elements. This making the modern table became the more efficent table of our time.
The oldest known elements in the periodic table are the ones with?
the oldest known element in periodic table is copper -8000 years old know element thank you
Where do elements get their names?
- from the names of planets - from the name of scientists - from toponyms - from mythology - from some characteristics of the chemical elements - from old words (in Greek, Latin, Arabian, Persan)
Has the periodic table changed in the last 75 years?
Yes. The periodic table has not been the same over the last 75 years, as many more elements have been discovered since then. My grandfather has a mouse mat with a periodic table from 20 years ago, and it is now out of date.
What happens to the atoms within molecules undergoing a chemical reaction?
In a chemical reaction sometimes old bonds are broken and new bonds are formed.
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i dont know if you were old you would knowi dont know if you were old you would know
Who discover the old Periodic Table?
Mendeleev discovered old periodic table. He arranged elements in order of atomic masses.
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