Transcription of Periodic table of elements - ScienceGeek.net
1 Periodic table of ( ) ( ) ( )281832186At85 Astatine( ) ( ) ( ) ( )2818322482Am95 Americium( )2818322582Cm96 Curium( )2818322592Bk97 Berkelium( )2818322782Cf98 Californium( )2818322882Es99 Einsteinium( )2818322982Fm100 Fermium( )2818323082Md101 Mendelevium( )2818323182No102 Nobelium( )018323282Lr103 Lawrencium( ) - E71E89 - E103 Rows in the table represent the periods and get longer as the atomic numbers increase. The number of electrons increase from left to right across the table . There are eighteen groups represented by columns in the table ; these groups have chemical features in common and have the same number of electrons in the outer orbit of the atoms.
2 Most of the elements are metals with the non-metals occurring more frequently in groups thirteen to eighteen. Groups one to twelve are exclusively metals and on the boundary between the two are metalloids which display properties of both metals and non-metals. Some of the groups have collective names: group one are the alkali metals; group two are the alkaline earth metals; group eleven are the coinage metals; group seventeen are the halogens; and group eighteen are the noble gases. The first widely recognised table was published in 1869 by the Russian chemist Dmitri number(number of protons in an atom) Chemical formulaAtomic weight (of most stable isotope when in brackets)Number of electrons orbiting in each ( )28183232162Rg111 Roentgenium( )28183232172112 Copernicium( )28183232182 CnUut113 Ununtrium( )28183232183114 Flerovium( )28183232184 Uup115 Ununpentium( )28183232185116 Livermorium( )28183232186 Uus117 Ununseptium( )28183232187 Uuo118 Ununoctium( )
3 2818323218812345678910111213141516171812 34567 Alkali metalsAlkaline earth metalsTransition metalsOther metalsOther non-metalsHalogensInert gasesLanthanidesActinidesTrans-actinides (Manmade atoms that exist for less than a second)Radioactive elementLiquid elementGas elementFlLv
