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Where and why does platinum fit in the periodic table of elements?
Pt and an atomic number of 78
What category would it most likely fit If an element is located in the middle of the periodic table?
Elements in the middle of the periodic table are metals, and they are probably best categorized as transition elements.
Did someone make the periodic table?
Yes, Dmitri Mendeleev made the Periodic Table of Elements, and interestingly enough, he did it without knowing all of the natural elements! As scientists discovered new elements, they realized the elements fit right into place on Dmitri's table.
Where do lanthanids and actinides fit into the periodic table?
Lanthanides (elements with atomic number 57-71) and actinides (elements with atomic number 89 to 103) are placed at the bottom of the periodic table.
Where are the lanthanides and actinides placed on the periodic table?
At the bottom of the Periodic Table
Why do elements appear more than once in the periodic table?
The modern periodic table doesn't, but someone probably organized the periodic table by characteristics. A few elements have multiple characteristics of various groups or periods.... Ergo, it would be fitting to place an element in multiple spots of the table as seen fit. Hope this helps (:
Who recognized a pattern in the properties of the elements and made the first periodic table?
In 1869, a Russian scientist named Dmitri Mendeleev arranged the elements in a table according to their atomic mass, this was the first periodic table. However, a few elements didn't fit the pattern in Mendeleev's table, so a new table had to be made, and that table is today's periodic table which is arranged by atomic number, and not atomic mass.
Why are the lanthanides and sctinides placed at the bottom of the periodic table?
The f-block elements are placed at the bottom of the periodic table because if they were placed where they belong the periodic table would be too big to fit on a normal sheet of paper.
What does f stand on the periodic table?
F stands for fluorine. It is placed in group-15.
How does silver fit in the periodic table?
Silver is the 47th element on the periodic table. It is located in period 5 and group 11 in the periodic table.
Why was Mendeleev's decision to leave blank spaces on his table sometime referred to as his most significant contribution to periodic table?
Mendeleev thought about the future and realized that it was entirely unlikely that all earthly elements had been discovered, so he left blank spaces in his table and even predicted some of the elements that would fit in those spaces. Surprisingly enough, as time passed, chemists began discovering many of the elements that he had predicted, which fit perfectly into his periodic table.
Did Mendeleev fix the problem of predicted where new elements would fit into the periodic table?
Yes, Dimitri Mendeleev did (accurately, I might add) predict where elements would appear in his table. He also correctly predicted some of the missing elements' properties, based on where they were positioned in his table.
