History of the atom Flashcards
1
Q
What did the periodic table used to be in order of
A
Atomic weight
2
Q
What is the current periodic table in order of
A
Atomic number
3
Q
Why did Dmitri Mendeleev leave gaps in his periodic table
A
The atoms Mendeleev had to work with didn’t fit the pattern therefore there must be other elements that fit it
4
Q
What was daltons atoms
A
Spherical atoms
5
Q
What is the plum pudding model
A
A ball of positive charge with electrons embedded in it
6
Q
When were neutrons discovered
A
1932
7
Q
When was the nucleus of the atom discovered
A
1911
8
Q
When were electrons discovered
A
1897
9
Q
Who discovered electrons
A
JJ Thompson
10
Q
Who discovered neutrons
A
James Chadwick
