History Of The Atom Flashcards
1
Q
John Dalton
A
Start of 19th century atoms were described as solid spheres
2
Q
JJ Thomson
A
1897- Plum puddling model - the atom is a ball of charge with electrons scattered
3
Q
Ernest Rutherford
A
Alpha scattering experiment - mass concentrated at the centre; the nucleus is charged. Most of the mass in nucleus. Most atoms are empty space
4
Q
Niels Bohr
A
Around 1911. Electrons are in shells orbiting the nucleus
5
Q
James Chadwick
A
Around 1940. Discovered that there are neutrons in the nucleus.
