The History of the Atom Flashcards
1
Q
Describe what scientists thought an atom was like before the electron was discovered.
A
Tiny solid spheres that can’t be divided
2
Q
How did John Dalton describe atoms?
A
He described them as solid spheres, and said that different spheres made up different elements
3
Q
Describe the plum pudding model.
A
A positively charged ‘ball’ with negatively charged electrons in it
4
Q
Describe Rutherford’s nuclear model.
A
A small, positively charged nucleus surrounded by a ‘cloud’ of negative electrons
5
Q
(Exam-style question)
A
6
Q
Name the scientist who adapted Rutherford’s nuclear model by suggesting that electrons orbit the nucleus at specific distances.
A
Niels Bohr
7
Q
Describe the Bohr model.
A
Electrons in fixed orbits surrounding a small, positively charged nucleus
8
Q
(Exam-style question)
A
