Iwill award ! members of the alkaline earth elements have several things in common. they are a) nonmetals and are nonreactive. b) metals with two valence electrons. c) metals that are not very reactive. d) metalloids with two valence electrons. after the fission of u-235 takes place, how many neutrons does the missing nucleus have? a) 84 b) 85 c) 141 d) 143

Which are forms of frozen water? check all that apply. dew frost hail rain sleet

Which process results in the release of energy stored in the products of photosynthesis? a. polymer synthesis b. depolymerization c. digestion d. cellular respiration

In a laboratory determination of the atomic weight of tin, a sample of tin is weighed in a crucible. nitric acid is added, and the reaction proceeds to give a hydrated tin(iv)oxide plus no2and h2o. the hydrated tin(iv)oxide is then heated strongly and reacts as follows: sno2.xh2o(s)sno2(s)+ xh2o(g)the sno2is finally cooled and weighed in the crucible. explain the effect on the calculated atomic weight of tin that would result from each of the following experimental errors: (a)considerable spattering occurs when the nitric acid is added to the tin.(b)the hydrated tin(iv)oxide is not heated sufficiently to change it completely to tin oxide.