Question 1 of 5

The first scientist to show that atoms emit any negative particles was

A. J. J. Thomson B. Lord Kelvin C. Ernest Rutherford D. William Thomson

Question 2 of 5

Bromine exists naturally as a mixture of bromine-79 and bromine-81 isotopes. An atom of bromine-79 contains

A. 35 protons, 44 neutrons, 35 electrons B. 34 protons and 35 electrons, only C. 44 protons, 44 electrons, and 35 neutrons D. 35 protons, 79 neutrons, and 35 electrons

Question 3 of 5

The degree of agreement among several measurements of the same quantity is called . It reflects the reproducibility of a given type of measurement.

A. accuracy B. error C. precision D. significance

Question 4 of 5

If the Thomson model of the atom had been correct, Rutherford would have observed:

A. Alpha particles going through the foil with little or no deflection. B. Alpha particles greatly deflected by the metal foil. C. Alpha particles bouncing off the foil. D. Positive particles formed in the foil.

Question 5 of 5

The agreement of a particular value with the true value is called

A. accuracy B. error C. precision D. significance

chemistry for health sciences

Skildor

ATI RN

ATI RN