WORKSHEET 1: INORGANICNOMENCLATURE For each question below, write out the questi

Question

WORKSHEET 1: INORGANICNOMENCLATURE For each question below, write out the question and its answer in your laboratory notebook. 1. With a few exceptions (zn2 and Ag the names of transition-and post-transition metal ions always contain a Roman numeral. Those of alkaline and alkaline earth metals, however, do not. For instance, you would write ron (ll) chloride" and not just "iron chloride." You would write "calcium chloride," but not "calcium (II) chloride." Why is this? 2. what is the charge metallic element in each of the following compounds? For one of these, explain of the how you determined the charge. Example: AlBr3. Br is -1 (oxidation number rule for halogens). There are three Br for a net of.3 which na or the AI must be +3. Answer: Al is +3

Explanation / Answer

Ans 1.

The roman numerals in the parenthesis in the compound after the name of the transition metal denotes its oxidation state . For eg in compounds such as Iron (II) chloride and Iron (III) chloride , the oxidation state of iron is 2 and 3 respectively .

Since you may notice , the transition metals can exist in variable oxidation states , hence it is imporatant for us to mention their oxidation number in the compound name , otherwise predicting its molecular formula becomes difficult .

Whereas if we talk about alkaline and alkaline earth metals , they do not show any variable oxidation state . Their oxidation number corresponds to their group number always , so there is no need to mention their oxidation state in the compound name .

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