C3.2.3 - Discovering the Periodic Table Flashcards
1
Q
Which scientist developed the Periodic Table?
A
Dmitri Mendeleev
2
Q
How did Mendeleev sort the elements into the periodic table?
A
- He wrote each element, its mass and how it reacted with hydrogen and oxygen on a piece of card.
- He arranged the cards in atomic mass order.
3
Q
What is meant by the atomic mass of an element?
A
The mass of the nucleus and electrons of a single atom of an element.
4
Q
Mendeleev was so confident of his periodic table that he did what?
A
Left gaps for elements that had not been discovered yet.
5
Q
Who discovered Rhenium?
A
Ida Tacke
Walter Noddack
Otto Berg
6
Q
What is Rhenium used as?
A
A catalyst to speed up chemical reactions.
Used in alloys to make jet engine parts.
