Henri Becquerel and the Curies are famous for discovering that the atom is not indivisible, a belief held since the time of the Greek philosophers.

True

False

The formula for sodium sulfide is Na2S. explain what this formula means.

What do all atoms of an element have in common? What number can be different and allow the atom to still be the same element

2H2S (g) 2H2 (g) + S2 (g) Kc = 1.67 * 10 ^-7 at 800 C A 0.500 L reaction vessel initially contains 0.0125 mol of H2S at 800 C. Find the equilibrium concentrations of H2 and S2.

Toluene (C7H8) and nitric acid (HNO3) are used in the production of trinitrotoluene (TNT, C7H5N3O6), an explosive.

How many elements are man made

Consider the balanced equation K, Croa (aq) + Pb (NO3) 2 (aq) → PbCrO4 (s) + 2KNO3 (aq) If 25.0 ml of a 1.00M K, Cro, solution is mixed with 10.0 ml of a 0.500M Pb (NO3) 2 solution. a. How many moles of potassium chromate are present? b.

Name 3 organisms that would be classified as eukaryotic, multicellular, and heterotrophic.

A bond formed by electrical attraction between two oppositely charged ions is called

Which indicator is blue in a solution that has a pH of 5.6? (1) bromcresol green (3) methyl orange (2) bromthymol blue (4) thymol blue

A hot meal plate at 150 has been placed in air at room temperature. Which event would most likely take place over the next few minutes