What is the total number of protons in an atom with the electron configuration 2-8-18-32-18-1?
(1) 69 (3) 118
(2) 79 (4) 197

An alcohol thermometer makes use of alcohol's changing in order to measure temperature. as the temperature goes up, the alcohol contained in the thermometer increases in volume, filling more of the thermometer's tube.

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.

A50.0g sample of liquid water at 0.0 c ends up as ice at -20.0 c. how much energy is involved in this change?