Which of the following was NOT among Democritus's ideas

Student follow up The Group 2 elements are known as the alkaline earth metals. They are reactive metals. Atoms of Group 2 elements lose two electrons to form ions with a 2 charge.

Why are the seasons for the southern hemisphere reversed from the northern hemisphere

If 22.5 liters of oxygen reacted with excess of hydrogen, how many liters of water vapor could be produced?

Compared to the Apollo program, the Space Shuttle has been A. a complete failure. B. much more successful. C. considered a mixed success. D. able to explore much more of the solar system.

G oil of wintergreen, c8h8o3 is prepared when methanol, ch3oh, is reacted with salicylic acid, c7h6o3. what is the percent yield of a reaction in which 15.3 g of oil of wintergreen is collected after 16.

You want to analyze a cadmium nitrate solution. what mass of naoh is needed to precipitate the cd2 + ions from 32.7 ml of 0.499 m cd (no3) 2 solution?

How much is 35° C in F?

Which describes a precipitate in a chemical reaction? a a gaseous product formed from aqueous reactants b a solid reactant that forms aqueous product c a gaseous reactant that forms aqueous products d a solid product formed from aqueous reactants

Prepare a solution that is 0.1 M acetic acid and 0.1 M sodium acetate by measuring out 5.0 mL of the 1.0 M acetic acid solution and 5.0 mL of the 1.0 M sodium acetate solution in a 100 mL graduated cylinder, diluting the 10.

Which element has an ion that is smaller than an ion of calcium?