Atomic Structure + Periodic Table Flashcards
(8 cards)
1
Q
Who came up with the Plum Pudding Model?
A
J.J Thomson
2
Q
Who performed the alpha particle scattering test and discovered that atoms are mostly empty space?
A
Ernest Rutherford
3
Q
Who deduced that electrons must exist in shells?
A
Niels Bohr
4
Q
Who discovered neutrons in the nucleus?
A
James Chadwick
5
Q
What does the bottom number symbolise on an element?
A
Atomic Number (no. of protons)
6
Q
What does the top number symbolise on an element?
A
Mass number (no. of protons + neutrons)
7
Q
How were elements originally ordered on the periodic table?
A
Atomic Weight
8
Q
How did Mendeleev order the elements?
A
Based on their properties, despite their atomic weight
