In the late 1800s, experiments using cathode ray tubes led to the discovery of the
(1) electron (3) positron
(2) neutron (4) proton

Motivation cannot be developed with practice; a person either possesses it or they do not.

Match each object to its description: a. coma of a comet b. comet tail c. oort cloud haze surrounding a nucleus created by solar wind. hypothetical sphere around the solar system

Which of the following represents the ester functional group? a. -coo- b. -cho c. -cooh d. c=o