atomic structure and the periodic table paper 1 Flashcards
(15 cards)
Who invented the plum pudding model?
JJ Thompson
what did JJ Thompson discover?
Electrons
what does the plum model look like?
Positive ball of charge with negative electrons scattered through throughout
what experiment did Ernest Rutherford do?
Scattering experiment, alpha particles
what happened in Ernest Rutherford’s scattering experiment?
He fired tiny alpha particles towards a gold sheet of paper in a room with a dome surrounding some of the alpha particles were deflected at the gold sheet most went straight through. Sam went through and were deflected off back wall
What was Ernest Rutherford’s conclusion after his experiment?
His conclusion was that atoms have small dense positively charge core called the nucleus with electrons orbiting around in mostly empty space
Who invented the nuclear model?
Ernest Rutherford
What did Neil’s ball discover?
Electrons orbit in fixed positions called shells
What model did neil’s bohr come up with?
bhor model
Who discovered protons and neutrons?
James Chadwick
what is the mass number?
The number of protons
what is the atomic number?
The number or sum of protons and neutrons
how do you calculate relative atomic mass?
(mass of isotope times abundance)/ 100
