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Chem.1st. smstr exam

Periodic Table

QuestionAnswer
Where did chemists assemble to solve the problems of no way to determine number of atoms in a particular compound or no consistent way to find atomic mass? 1st international congress of chemists
presented a method for determining atomic mass Cannizaro
included the new values for atomic mass in a textbook he was writing Mendeleev
discoverer of periodic law Mendeleev
examined the line emission spectra for 38 elements and noticed that elements fit better into patterns when they were arranged according to nucleur charge or the number of protons in the atoms Moseley
his work led to defintion of atomic number Moseley
states that the physical and chemical properties of the elements are periodic functions of their atomic numbers Periodic Law
an arrangement of the elements in order of their atomic number so that elements with similar properties fall in the same column or group modern periodic table
discoverer of Radon Dorn
additions to the new periodic table: noble gases, lanthanides, actinides
added noble gas group to periodic table and discovered the noble gases Ramsay
group of 8 electrons filling the highest energy level of an atom octet
a unique element with properties that do not match any of those on the periodic table hydrogen
group 1 alkali metals
silvery metals that are soft enough to be cut with a knife; very reactive; 1 outer shell electron alkali metals
group 2 alkaline earth metals
harder, denser,stronger than group 1 metals; 2 outer shell electrons alkaline earth metals
d-block elements transition elements
shiny metals; good conductors transition elements
s-block elements together with the p-block elements main group elements
shiny 4f metals silimar in reactivity to alkaline earth metals lanthanides
5f metals that are all radioactive actinide
actinide and lanthanides make up___ inner transition elements
Created by: lovecamille018