Conductivity Context for Use This is a lab activity for a high school introductory chemistry laboratory. It can be used as an introduction to the periodic table. It requires samples of elements see list in the handoutmicro-conductivity testers made from a nine-volt batteries, LED and wiresdilute HCl and hammers. It requires approximately minutes of class time.
Label seven wells in a clean well-plate A-G Place a sample of each element into a separate well Add drops of 0. Label seven wells in the clean well-plate A-G Place a sample of each element into a separate well Add drops of 0. Although testing for metals, metalloids, and non metals may seem easy, in reality my group and I had a hard time concluding which unknown elements were actually metals, nonmetals, or metalloids.
From our five observations, it was easy to detect if the elements were either metals or nonmetals because metals are malleable, conduct electricity, and are luster.
And nonmetals are dull, do not conduct electricity, and are brittle. On the other hand, identifying the element as a metal or metalloid was quiet difficult because metalloids are a mixture of both metals and nonmetals.
If my group and I just looked at the appearance of the unknown elements we would have concluded false information. Therefore, we had to look at all the results from the five observations to make an accurate conclusion. This was difficult because some elements conducted electricity, but could easily shatter brittle at the same time like elements D and G.
And some elements could have not conducted electricity, but was malleable at the same time like element A. Along with the other comparisons, some elements may have been brittle, but reacted with the solutions like element A. With all these different types of conclusions, my group and I finally were able to decide which unknown elements were metals, metalloids, or nonmetals.
When the class's results were all put together in a data table, it was obvious that there were a variety of results. For element A, most groups concluded that it was metal, while one group concluded it was a nonmetal. For element B, there was a tie that the element was either a metalloid or a metal.
For element C, all groups conclude that the element was a metal besides one group that thought the element was a metalloid.
For element D, there was a mixture of results that the element was either a metal, nonmetal, or metalloid. For element E, most groups concluded that the element was a nonmetal.
For element F, all groups concluded that this element was a metal. And finally for element G, there was a variety of results for metals, metalloids, and nonmetals. The different results from all the groups could be that there was a confusion on whether the element was a metal, nonmetal, or a mixture of the two.
And with this confusion could come the variety of results. In this experiment the physical properties tested was the appearance and the crushing of the element. The chemical properties tested in this experiment was was conductivity of the element and the reactivity with copper chloride and hydrochloric acid.
The first group of the seven unknown elements are called the metals. This group consists of elements A, C, and F. The second group of the unknown elements are called the nonmetals. This group consists of one element, which is element E.
The elements that could fit into either groups would be element B, D, and G. These elements would be metalloids. This is because their appearance may say something, but the other observations may say something else. For example these elements may look luster and conduct electricity, but they are actually brittle and don't react with the two solutions.
And some of these elements may look dull, but actually conducts electricity.
The tested elements that are metals are elements A, C, and F. The tested elements that are metalloids are elements B, D, and G. And lastly the tested element that is a nonmetal is element E.Lab: Metal or Nonmetal?
Now, we will address the purpose of this lab, by sorting the elements tested into three groups, metals, nonmetals, or metalloids.
Use the following information to sort the elements into these three groups: a.
metals have a luster (shine), are malleable, and conduct electricity. Metal, Nonmetal or Metalloid Lab Purpose The purpose of this lab is to decide if an element is a metal, nonmetal, or metalloid after investigating its chemical & physical properties.
Safety You must wear safety goggles throughout this lab. Free elementary, middle and high school teacher resources, including puzzlemaker, student games and activities and lesson plans. Created Date: 3/11/ PM.
Metal-Nonmetal name_____P_ Use the web site urbanagricultureinitiative.com as a starting point. Complete the chart information for each. METAL, NONMETAL, OR METALLOID LAB. All known elements can be classified as metals, nonmetals, or metalloids according to the substance’s specific physical and chemical properties.
Physical properties. are properties that can be observed without changing the identity of a substance, and.