Evidence for Atomic Structure

Front

Who is the philosopher that stated that there must be some indivisible unit and called it an atom? Options: Democritus, Aristotle, Dalton, Thomson

Back

Democritus

Front

Who led to the idea of a negative subatomic particle?

Back

Thomson

Front

Experiments with alpha particles and gold foil led to the discovery of:

negative electron

,

electron energy levels

,

neutral neutron

,

a positive nucleus

Back

a positive nucleus

Front

What accounts for the larger deflections shown in figure 2 as compared to figure 1?

Back

The positive charge is greater in figure 2

Front

Why are the alpha particles passing straight through?

Back

The positive charge is too scattered to deflect them.

Front

Who's model is this?
Options: Millikan, Rutherford, Thomson, Dalton

Back

Rutherford

Front

Rutherford's gold foil experiment provided evidence that...

Back

there is a dense positively charged nucleus at the center of an atom.

Front

What contribution did John Dalton make to atomic theory? Options: He discovered that every atom was positively charged., He discovered that every element consisted of one type of atom that couldn't be divided., He discovered that atoms had nuclei., He discovered that atoms could be divided into smaller parts.

Back

He discovered that every element consisted of one type of atom that couldn't be divided.

Front

What does the nucleus of an atom contain?

Back

Protons and neutrons

Front

Correct sequence of scientists who made major changes in the model of the atom: 1-JJ Thomson, 2-Erwin Schrodinger, 3-John Dalton, 4-Niels Bohr, 5-Ernest Rutherford

Back

3, 1, 5, 4, 2