History of the Periodic Table
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| A repeating pattern | periodic
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| How did Mendeleev arange the elements in his first published periodic table | Vertical
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| How is the atomic mass of each element indicated in Mendeleev's 1st periodic table | By the number followiing the elements sysmbol
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| In Mendeleev's 1st periodic table how were the unknown elements indicated | by a question mark
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| How did Memdeleev arrange the elements in the first table | Similar properties were grouped together
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| What 3 elements were missing from mendeleev's table but were later discovered | scandium, Sc, gallium, Ga, adn germanium, Ge
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| What did Moseley work lead to | The Modern definition of atomic number and teh recognition that atomic number not atomic mass is the basis for the organization of the periodic table.
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| The physical and chemical properties of the elements are periodic functions of their atomic numbers | Periodic law
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| An arrangement of teh elements in order of their atomic numbers so that elements with similiar properties fall in the same column, or group. | Periodic Table
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| What was the most significant addition to the periodic table | The discovery of the noble gases
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| Helium had been discovered as a component of | The sun
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| Who proposed that a new group be added to the periodic table to fit argon and helium | Ramsey
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| The 14 elements with atomic numbers from 58 to 71. | Lanthanides
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| The 14 elements with atomic numbers from 90 to 103 | actinides
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| The lanthanides and actinides belong in what period of the Periodic table | Periods 6 and 7
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| created a table in which elements with similar properties were grouped together | Mendeleev
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| discovered that the elements fit into patterns better when they were arranged according to atomic number, rather than atomic weight | Moseley
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You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
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Created by:
tbstinso
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