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Jose Batista†††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††† 11/19/2006
Trends in the Periodic Table

 


v     Problem 1: What is the trend in reactivity as you go down the alkaline earth metals group on the periodic table?

 

Introduction

 

††††††††††† In this experiment we will find what is the trend in reactivity as we from top to bottom on the alkaline earth metals group on the periodic table of the elements. In order to find out we need to go directly to the group on the periodic table. It is very important to this information. We need to know the trend in relativity of these elements. To make sure we do not injure ourselves, we will not mix two highly together reactive elements.

††††††††††† We know that the alkaline earth metals are the second most reactive metals, but we need to know which one of them is the most and least reactive. We are going to find out the top or bottom elements are the most or least reactive. If you compare the alkaline earth metals to the alkaline metals, you will find out that the alkaline earth metals are harder, denser, stronger, and have higher melting points than the alkali metals (Myers, Oldham, and Tocci). I expect that as you down the alkaline earth metals group the reactivity trend will increase.

 

 

v     Problem 2: What is the reactivity trend as you go from left to right across the periodic table of the elements?

 

†† †††††††† In this experiment we will find out what is the reactivity trend as we go from left to right across the periodic table. We need to find out what is the reactivity trend when magnesium, zinc, and aluminum are combined with hydrochloric acid. We find out which ones are least and most reactive. It is important to know this information. To make sure we do not get hurt while doing an experiment by combining two highly reactive elements, we need to find each elementís reactivity. I think that as you from left to right across the periodic table the reactivity trend will decrease.

†† Conclusion

††††††††††† Problem 1

††††††††††† This experiment has proven that there is a trend in reactivity as you down the alkaline earth metals group on the periodic table. According to the data as go down the†† alkaline earth metals group on the periodic table, the reactivity trend increases. I added sodium phosphate to magnesium nitrate and it did not react at all. In fact when I added sodium phosphate to barium nitrate it reacted and it turned white. This proves that as go down the alkaline earth metals group on the periodic table, the reactivity increases because if you look at magnesium on the alkaline earth metals group you will that it is at the top and does not react. When barium on the alkaline earth metals group you will see that it is at the bottom and it reacts when sodium phosphate is added.

 

††††††††††† Problem 2

††††††††††† This experiment has proven that as you move from left to right across the periodic the reactivity trend decreases. This is according to the periodic table and the data table that I made. The trend in reactivity decreases as you from left to right across the periodic table. I added hydrochloric acid to magnesium zinc, aluminum to see what the reaction would be. Magnesium and zinc reacted when hydrochloric acid was added.

††††††††††† Magnesium has an atomic mass of twenty-four, and it reacts with hydrochloric acid. It is also far to the left on the periodic table. Aluminum has and atomic mass of twenty-six, which is higher than magnesiumís, and it is to the right on the periodic table. It does not react with hydrochloric acid this proves that elements further to the right have a higher atomic mass, but are less reactive. Elements further to the left and with a lower atomic mass have a higher trend in reactivity. This statement proves that my hypothesis was correct.

 

 

 

 

 

 

 

 

References

 

 


v     Myers, R. Thomas, Dldham, Keith B., and Tocci, Salvatore. Chemistry: Visualizing Matter: Holt, Rinehart, and Winston, 2000, P. 120