Identify the following mineral: hardness that a copper penny will scratch; color black; pearly luster.
talc
mica
gypsum
horneblende

What is the chemical formula of the following compound

What are the first three quantum numbers for the electrons located in subshell 2s?

How are evaporation and sublimation similar? a both involve the formation of a gas. b both release energy to the surroundings. c both take place throughout a solid. d both take place at the surface of a liquid.