2007-01-13 06:55:02 · 7 answers · asked by Destiny L 1 in Science & Mathematics ➔ Chemistry
In 1869 a Russian chemist named Dmitri Mendeleev made the first Periodic Table but he arranged element by atomic mass. It worked well to arange and predict properties of element and even was used to predict elements before they were discovered. In 1911 An English chemist named Henry Moseley found is was better to arrange the elements by atomic number and created the modern Periodic Table. There were only a few differences in the new table for the known elements of the time.
2007-01-13 07:08:09 · answer #1 · answered by phyteacher 2 · 1⤊ 0⤋
Dmitri Mendeleev invented the original periodic table in 1869.
2007-01-13 07:00:31 · answer #2 · answered by The answer guy 3 · 0⤊ 0⤋
Mendeleev invented the 1st periodic table which had some drawbacks...so Moseley invented the modern periodic table :)
2007-01-13 07:03:34 · answer #3 · answered by confunded 2 · 0⤊ 0⤋
A russian scientist named Dimitry Mendeleev put the Periodic Table together in 1871. Although he hadn't discovered all the elements he knew by the masses of the elements he did know that lots where yet to be found and left space for future scienists to put them where they belong. (Funny to see this question...my daughter just learned this in her K-12 3rd grade science lessons)
2007-01-13 07:09:11 · answer #4 · answered by Jenni P 1 · 0⤊ 1⤋
Probably after someone had a period.
2007-01-13 06:59:09 · answer #5 · answered by Anpadh 6 · 0⤊ 0⤋
Upon its creation
2007-01-13 06:58:53 · answer #6 · answered by abcde12345 4 · 0⤊ 0⤋
around 1880's
I hope this helps!!
2007-01-13 08:27:10 · answer #7 · answered by smart-crazy 4 · 0⤊ 0⤋