Russian chemist Dmitri Mendeleev ( 1834-1907) is credited with creating the periodic table of elements… He was smart enough to realize that his table was incomplete so he left blanks where he predicted that yet to be discovered elements would fit, but what I find amazing about Mendeleev’s table is how it is based upon the 19th century thinking that electrons were savor little planets spinning around the nucleus.
- The image was of electron “shells” layering upon each other as the complexity of the elements increased, then each row of the periodic table represents a shell while each column represents a series of elements that are chemically similar as in #29 copper (Cu), #47 silver (Ag), as well as #79 gold (Au).
I’ve constantly felt sorry for #7 nitrogen (N)… She sits right next to his sibling atom #8 oxygen (O) on the periodic table as well as he is savor the plain Jane with his several electrons. Oxygen’s extra electron makes his the more “lovely” of the 2 as well as gives his a host of chemical talents that nitrogen could never hope to duplicate such as being the essential element for life as well as the ability to combust, and fortunately, nitrogen has his crucial roles as well as 1 of them is to keep his more popular sibling from damaging your Heating as well as A/C system; Certain metals find oxygen irresistible. Iron will rust as well as copper, the same material in the cooling tubes of your Heating as well as A/C, will form the correct greenish patina that can flake off as well as mangle your Heating as well as A/C system. This is why a nitrogen purge is needed when a modern Heating as well as A/C plan is being installed or as section of a refrigerant recharge! Nitrogen just loves to carry that oxygen along with his into the atmosphere where he outnumbers his wayward sibling by a more than three to 1 ratio.