Unit 1- History of The Periodic Table Flashcards Preview

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Flashcards in Unit 1- History of The Periodic Table Deck (6)
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1

how did Mendeleev organize the periodic table? What made him so smart?

he didn't restrict himself to a repetition pattern of eight
he organized the elements in order of increasing atomic mass

he was a genius because he could predict where new elements would be found

2

what is the modern periodic law and how are the elements in the modern periodic table arranged?

they are arranged in order of increasing atomic number

there is a repetition of elements with similar properties

3

what was one problem with Mendeleev's way of organizing?

iodine and Tellurium were in the wrong order

4

what are the two organizing principles of the modern periodic table?

in order of increasing atomic number

elements with similar chemical and physical properties we're grouped

5

why is family a good term to use for the elements in the same column? Name the four most famous families?

they have similar chemical and physical properties

alkali metals alkaline Earth metals halogens noble gases

6

valence versus valence electron

valence is the charge on an atom when it gains loses or shares electrons

valence electrons are electrons in the outer most shell