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Invented the present system of representing the elements usnig the first or another letter of their latin or english name
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tarix | 05.03.2018 | ölçüsü | 467 b. | | #30184 |
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INVENTED THE PRESENT SYSTEM OF REPRESENTING THE ELEMENTS USNIG THE FIRST OR ANOTHER LETTER OF THEIR LATIN OR ENGLISH NAME. INVENTED THE PRESENT SYSTEM OF REPRESENTING THE ELEMENTS USNIG THE FIRST OR ANOTHER LETTER OF THEIR LATIN OR ENGLISH NAME. Symbols are written with the first letter in upper case.
From their discoverer/scientist – examples are Md, Lr, No, Es, Fm From their discoverer/scientist – examples are Md, Lr, No, Es, Fm From the place of discovery – examples are Fr, Mg, Sc, Am, Bk, Eu
PERIODS – are the horizontal arrangements of elements in the p.t. (7 rows) PERIODS – are the horizontal arrangements of elements in the p.t. (7 rows) GROUPS/FAMILIES - are the vertical arrangements of elements in the p.t. a. Int’l Union of Pure and Applied Chem (IUPAC) version – 1 through 18 groups, new version b. Chemical Abstracts Service (CAS) version – Group A (I – VIII) main or representative elements
Metals, Nonmetals, Metalloids Metals, Nonmetals, Metalloids s,p,d,f blocks http://www.gordonengland.co.uk/elements/blocks.htm
A Group A Group – main/representative elements composed of metals & nonmetals & metalloids where s & p sublevels are filled up partially or completely Group O Are nonmetals at the end of each period Also known as the noble or inert gases; they are very unreactive Have completely filled the s & p sublevels except He.
B Group Metals where the d sublevel is being filled up Inner Transition elements -> rare earth metals actinide -> 5f sublevel is filled -> radioactive elements
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