Chemistry Midterm Review

Front

What experiment did Ernest Rutherford devise in 1910 to test the plum-pudding model of atomic structure?

Back

Gold foil experiment.

Front

What experiment was responsible for discovering electrons, a negatively charged particle?

Back

Cathode-Ray Tube Experiment.

Front

Which element is highly reactive and is stored under oil to prevent contact with air and moisture?

Back

Sodium (Na).

Front

What does the symbol 'C-12' represent in isotopic notation?

Back

Carbon with 6 protons and 6 neutrons.

Front

What does isotopic notation for an element include?

Back

The mass number and atomic number.

Front

What is the charge of an electron?

Back

Negative.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is the mass number of an atom?

Back

The total number of protons and neutrons in the nucleus.

Front

What is the significance of the Gold foil experiment?

Back

It led to the discovery of the atomic nucleus.

Front

What is the plum-pudding model?

Back

An early model of atomic structure that proposed atoms were composed of electrons scattered within a 'soup' of positive charge.