Module 3: Lesson 1 and 2 Exam

Front

What experiment was used to discover the nucleus?

Back

Gold Foil Experiment

Front

What is Dalton's first point about atoms?

Back

Atoms of the same element are identical.

Front

What is Dalton's second point about atoms?

Back

Atoms of different elements can physically mix together or can chemically combine in simple whole-number ratios to form compounds.

Front

What is Dalton's third point about atoms?

Back

Chemical reactions occur when atoms are separated from each other, joined, or rearranged in different combinations. Atoms of one element are never changed into atoms of another element as a result of a chemical reaction.

Front

What is Dalton's fourth point about atoms?

Back

Electrons do not have a set size and path.

Front

Which subatomic particle has a positive charge?

Back

Proton

Front

Which subatomic particle has a negative charge?

Back

Electron

Front

What is the Plum Pudding Model?

Back

A model of the atom proposed by J.J. Thomson, suggesting that electrons are embedded in a positively charged 'soup'.

Front

What is the Rutherford Model?

Back

A model of the atom proposed by Ernest Rutherford, which describes the atom as having a small, dense nucleus surrounded by orbiting electrons.

Front

What is the Quantum Mechanical Model?

Back

A model of the atom that describes electrons in terms of probabilities and wave functions, rather than fixed orbits.