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Periodic Table Explained: Name Origin

Periodic Table Explained: Name Origin
it took hundreds of years for scientists to discover all 92 different kinds of atoms that exist each kind makes a different substance because a substance made of only one kind of atom is called an element there are 92 elements in the universe scientists made a list using the weights of their atoms starting with the lightest hydrogen to the heaviest uranium they gave each element its own number showing its place in this list site is called this it's atomic number so hydrogen must have an
periodic table explained name origin
atomic number of one and uranium an atomic number of 92 scientists noticed something going along the list of elements the first two on the list hydrogen and helium are both light colorless gases although they look alike when we place a lighted match to hydrogen it explodes but when we light up helium it just puts out the flame we can say that hydrogen is chemically reactive whereas helium is chemically unreactive or inert after helium there's an abrupt change to lithium which is a soft shiny
metal beryllium is a shiny metal too but a bit harder boron is a brown powder then further to the right the elements become nonmetals often gases until we reach neon a colorless gas that is chemically unreactive or inert like helium then another big change to sodium which is a soft shiny metal followed by magnesium and aluminium which are harder metals you know what metals are usually shiny malleable solids that can conduct electricity following these three metals come silicon which is a semi
periodic table explained name origin
metal and not so conductive further to the right are four nonmetals which don't conduct electricity at all phosphorus sulfur which are brittle solids and chlorine and argon which are gases hmm argon is another inert colorless gas then yet another abrupt change to the soft shiny metal potassium the next 12 elements are metals all the way to gallium semimetals germanium and arsenic are followed by nonmetals selenium bromine and Krypton Crypton is yet another colorless inert gas so can you
guess what kind of element rubidium is it's a soft shiny metal of course this is getting repetitive another word for repetitive is

periodic

Yanik

table

got

periodic

in its

name

the point where one cycle ends and the next one starts is where an inert colorless gas meets a soft shiny metal are there any more of these this is interesting can you spot another break it's between the colorless inert gas and the shiny metal now that means between xenon 54 and cesium 55 notice that the brakes
periodic table explained name origin
seem to be getting further apart and there are more metals and not so many nonmetals between the brakes this is the last colorless inert gas on the list called radon we can't show the elements beside it astatine and francium because they're so rare that there isn't enough on earth to see them but scientists can guess that francium is a soft metal because it follows a colorless inert gas that last ones familiar mr. uranium pleased to meet you and now we'll back up so that we can
see them all even though the

name

s and symbols are too small to see here are the six line breaks that split an inert colorless gas and a shiny metal now watch this scientists divided the long line of elements into seven shorter lines at the breaks and put them under each other this is the birth of the seven horizontal rows of the

periodic

table

each row ends with an inert colorless gas because these gases are so similar they form a kind of family and to put underneath each other in the same
column each element after the inert gas is a soft shiny metal and starts the next row then from left to right all rows except the first one repeat the same pattern they start with metals on the left then move to semimetals in the middle then finish with nonmetals on the right with the last nonmetal being an inert colorless gas another word for repeating is

periodic

because the arrangement of elements is now in rows and columns it should also be called a

table

the

periodic

table

of the elements