The plum pudding model is defined by electrons surrounded by a volume of positive charge, like negatively-charged plums embedded in a positively-charged pudding
Oops!
Check
Okay!
Check
15
Who proposed that: everything is composed of atoms that are indivisible, all elements are made up of different atoms with different masses, when atoms combine they form chemical compounds
John Dalton
Oops!
Check
Okay!
Check
15
Who introduced the first atomic theory in 1803-1808?
John Dalton
Oops!
Check
Okay!
Check
15
Who discovered neutrons?
James Chadwick
Oops!
Check
Okay!
Check
15
Who discovered protons?
E. Goldstein
Oops!
Check
Okay!
Check
20
Draw the gold foil experiment and explain the findings/
Atoms are mostly empty space (that is why most of the atoms passed through) The atoms has a concentration of positive charge (that explains why some bounced)
Oops!
Check
Okay!
Check
15
Explain the findings of JJ Thomson
He discovered the presence of electrons (negatively charged particles)
