![]() ![]() Why do you think engineers must understand the periodic table? (Answer: Understanding the elements of the periodic table and how they interact with each other is important for engineers because they work with all types of materials. The periodic table of the naturally-occurring elements. What else can we learn by looking at the periodic table? (Possible answers: element names, element abbreviations, atomic numbers, numbers of protons, rare earth elements, etc.) What can we learn from how they are arranged in the table? (They are arranged by their number of protons, or atomic number.)įigure 2. The periodic table has several categories, such as: non-metals, halogens, noble gases, metalloids, alkali metals, alkaline earth metals and poor metals. So, the elements with similar properties are grouped together. First of all, elements are arranged in different groups (vertical) and periods (horizontal). The periodic table tells us a lot of information about the elements. (Point out the locations of all the elements in the student-generated list.) ) Let's find the elements you already know. Show the periodic table, poster size or via overhead projector using the attached Periodic Table Visual Aid or from the Internet using the dynamic periodic table at. Who remembers that the periodic table organizes the elements based on their properties? Today let's learn about some of those properties. (If some students suggest compounds, clarify the difference between elements and compounds. These building blocks are what combine to create everything we see around us. Think of elements as the most basic building blocks. Remember that the elements in the periodic table cannot be further broken down to form a different element. Let's make a list of all the elements we can think of and write them on the board (or on an overhead transparency). A basic understanding of the structure of an atom is helpful, as presented in the The Fundamental Building Blocks of Matter lesson in the Mixtures & Solutions unit. International Technology and Engineering Educators Association - TechnologyĮlement Superhero Example (pdf) Visit [ to print or download.Ī basic understanding of the periodic table of the elements. Time, space, and energy phenomena can be observed at various scales using models to study systems that are too large or too small. Atoms form molecules that range in size from two to thousands of atoms.Īlignment agreement: Thanks for your feedback! Solids may be formed from molecules, or they may be extended structures with repeating subunits Substances are made from different types of atoms, which combine with one another in various ways. This activity focuses on the following Three Dimensional Learning aspects of NGSS:ĭevelop a model to predict and/or describe phenomena.Īlignment agreement: Thanks for your feedback! Solid bases may be used in anion exchange resins or for reactions with gaseous acids.Develop models to describe the atomic composition of simple molecules and extended structures.Ĭlick to view other curriculum aligned to this Performance Expectation Examples include silicon dioxide (SiO 2) and NaOH mounted on alumina. A neutral base is one which forms a bond with a neutral acid such that the acid and base share an electron pair from the base.The strongest superbase is the ortho-diethynylbenzene dianion (C 6H 4(C 2) 2) 2−. An example of a superbase in sodium hydride (NaH). A superbase cannot remain in aqueous solution because it is a stronger base than the hydroxide ion. Such bases are formed by mixing an alkali metal with its conjugate acid. These bases have very weak conjugate acids. A superbase is even better at deprotonation than a strong base.Its aqueous solution includes both the weak base and its conjugate acid. A weak base incompletely dissociates in water.Examples of strong bases include sodium hydroxide (NaOH) and potassium hydroxide (KOH). A strong base completely dissociates into its ions in water or is a compound that can remove a proton (H +) from a very weak acid. ![]()
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