Which is a characteristic of the part of the atom marked “b”? it is very dense. it has a large mass. it is negatively charged. it is where neutrons move.

An atom of which element reacts with an atom of hydrogen to form a bond with the greatest degree of polarity ?

Write a balanced equation showing the formation of copper (ii) nitrite from its elements

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.