Protactinium
Uranium
Fluorine
Dmitri Mendeleiev. The periodic table was in fact first known as the Mendeleiev table. I was not complete at the time of his death, but he predicted the existence of several elements not yet discovered.
QATAR
2n2 so 2 x 92 = 162 (THEORECTICALLY)
76 Fahrenheit is 24,4 Celsius (76-32= 44 / five-ninth)
The 29th element is copper.
Actinium
Praseodymium
I think 49th is Indium
Thulium or TM, haha :)
Fluorine
No. The ninth element on the table is fluorine. Fulcrum is not an element; it is the technical name for the pivot point of a lever.
one ninth of a hundred percent = 1/9 * 100% =11.11%
The ninth term in a series is called the "ninth element" or the "ninth member" of the series.
It was recognized by the inventor of the Periodic table that these empty spaces are for elements/isotopes that would be discovered someday. Dmitri Mendeleev is generally credited with the publication, in 1869, of the first widely recognized periodic table. He developed his table to illustrate periodic trends in the properties of the then-known elements. Mendeleev also predicted some properties of then-unknown elements that would be expected to fill gaps in this table.
one ninth of a hundred percent = 1/9 * 100% =11.11%
100/9=11.111111111111111111111111111...