Section 8.1- Historical Development of the Periodic Table

Question 1

between 1737 and 1869 alone, ____________ new elements were discovered

Answer 1

49

Question 2

German chemist who grouped certain elements in groups of three that he called triads

Answer 2

Johann Dobereiner

Question 3

Each triad consisted of ________________ with more or less similar properties

Answer 3

Three elements

Question 4

Noticed that there was a repetition of similar properties every eighth element. He called his arrangement the

Answer 4

Law of octaves

Question 5

Based good table primarily on physical properties

Answer 5

Lothar Meyer

Question 6

Based his table on chemical properties

Answer 6

Dmitri Mendeleev

Question 7

Mendeleev based his table on what he called the____________________

The idea that the properties of the elements are periodic functions of their atomic masses

Answer 7

Periodic law

Question 8

Is associated with the periodic law

Answer 8

Henry Moseley

Question 9

States that the physical and chemical properties of the elements are periodic functions of their atomic numbers

Answer 9

Periodic law