CMaughan33

The guiding question for this lab is Is reactivity a periodic property? We were trying to answer this to gain a better understanding on how the elements are arranged in the periodic table and find if reactivity was a periodic or quasi-periodic property. During our experiment we carried out reactions between various elements and water, we then recorded all of our results in a table. Our claim was Yes, Reactivity is a periodic property.  Our evidence is below. Metals                    Reactions                     -Potassium(1c4r)    Sparked, smoke was released, sizzling sound, dissolved -Sodium(1c3r)         Moved around water sporadically, smoke was released, sizzling sound, dissolved -Calcium(2c4r)        Bubbling, gas is produced, heat was produced -Magnesium(2c4r)   Strip of metal turned pink, bubbles formed -Copper(11c4r)         No reaction *Numbers and letters in parentheses show where the element is located in Periodic Table, C=column R=row. The elements are li

The Guiding Question we were trying to answer was What are the identities of the unkno wn substan ces? We were trying to find the unknown substances based upon a flame test and the emissions of the other seven known solutions. During the investigation we were given seven different toothpicks that were soaked in different ions of chloride, one by one we stuck it into the inner flame of the Bunsen burner and observed and recorded what colour of light the flame produced. Our claim was The unknowns were 1-Lithium, 2-Strontium, 3-Barium, 4-Sodium. Our evidence for this is below. Ion           Colour of Flame Calcium- orange/red Barium- yellow/lime green Copper II- green Lithium- red Potassium- peach Sodium- neon orange Strontium- bright red/orange Unknown #1 -peach Unknown #2- red/orange Unknown #3- yellow/green Unknown #4- bright orange Our justification for this is that the flame test works because these ions are composed differently and require different amounts of energy to