4.1 How are Elements Organized? – Flashcards

Adam Howard

7 July 2022

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question

law of octaves
(Discovered by?)

answer

(John Newland)
elements in a given row have similar properties that repeat every eight elements.

question

Problems w/Mendeleev's ;Periodic Table
(How many elements are included?)

answer

contained gaps
elements weren't in order of atomic mass
(63)

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Henry Mosely's Way to Arrange Elements
(What else did he create?)

answer

By atomic number, not atomic mass

(the modern definition of atomic number)

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periodic law

answer

Elements are arranged by thier atomic #s and elements with similiar properties occur regularly

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valence electron

answer

Electrons in the last energy level

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group (two other names)
(what do they have in common?)

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family/column
(the same number of valence electrons)

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period (two other names?)
(what do they have in common?)

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series/row
(same number of occupied energy levels)

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(Order of scientists who have made contributions to the periodic table?);
;
What did each do?

answer

Newland (law of octaves)
Mendeleev (arranged into table by atomic mass)
Mosely (rearranged by atomic number)

question

(how many natrual elements?)

answer

(92)