Symbol, atomic number, and atomic weight.
Atomic number and weight
It is about half
The first twenty elements are made up f different things
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H2O isn't a single element, which is what the periodic table Most things are made of compounds of these elements. . It is comprised of 2 hydrogen atoms (H, on the periodic table) and oxygen (O, on the periodic table).
There are 6 orange colored tabs on the periodic table of elements, the Alkaline Earth Metals, which are Beryllium, Magnesium, Calcium, Strontium, Barium, and Radium. But of course, not all periodic tables have the same color scheme so this may be incorrect.
The periodic table was not 'identified.' It is simply all known elements ordered by similar qualities and atomic number, among other things.
Elements on the periodic table are usually identified by their atomic number, atomic symbol, and atomic weight. The atomic number represents the number of protons in the nucleus, the atomic symbol is a one- or two-letter abbreviation for the element, and the atomic weight represents the average mass of the element's atoms.
Elements in the table are identified by different things. What they are made of, atomic mass, and atomic number. Elements can also be identified by what state of matter they are at zero degrees Celsius and standard pressure which 1atm. The most current, standard table has 117 different elements.
Elements
There are only 117 out of 118 elements on the Periodic Table that have been identified by research groups. Only 112 of the 117 have been recognized by the IUPAC. So, technically, there are 118 elements.
Yes, all the elements (natural or artificial) are contained in the periodic (Mendeleev) table of the elements.
I have no idea how to answer that. All the things listed in the periodic table are elements, and there are a lot more than 32 of them.
Lanthanide elements
It is about half
The first twenty elements are made up f different things
by their atomic number
Because it shows all the natural occoring things on earth