If you think you’re been graded inaccurately, please contact your instructor. Similar to other answers, Mastering automatically grades molecule drawing answers. Use the color legend to identify elements labeled as alkali metal, alkaline earth metal, other metal, metalloid, transition metal, or nonmetal. Metals/Nonmetals: Select for elements to appear classified as metallic or nonmetallic.Use the color legend to identify s Block (includes Group 1 alkali metals with one valence electron & Group 2 alkali earth metals with two valence electrons), d Block (transition metals with electrons in d orbitals), p Block (elements with valence electrons in the p orbital), and f Block (inner transition metals with electrons in f orbitals). Blocks: Select to distinguish which block an element belongs to.Standard state: Select to see the standard state of elements in the periodic table, whether gas, solid, liquid, or other.These colors are commonly used to distinguish atoms of different chemical elements in molecular ball and stick models. Choosing CPK makes the element names appear in CPK colors. Your selection remains active if you close the periodic table and then return to it within the same Mastering session. To change your view of the periodic table:Ĭhoose one of the following color schemas to refer to when drawing molecules. Close the periodic table to return to the drawing canvas. Important: If you move on to another item or close Mastering before selecting Submit, your molecular drawing work is not saved. Select Decrease Charge from the toolbar and select the bottom Oxygen on the canvas.Select Increase Charge from the toolbar and select Sodium on the canvas.Increase or decrease the charge for an atom.Select the bottom Oxygen atom on the canvas 3 times to add 3 electron pairs.Select the top Oxygen atom on the canvas (it changes color) twice to add 2 electron pairs.Select Paired Electrons from the toolbar.Switch to Single Bond from the toolbar, point to Carbon on the canvas and add one bond to the Hydrogen atom and another bond to the lower Oxygen atom.Select Double Bond from the toolbar, point on the top Oxygen atom on the canvas and drag to make the bond with the Carbon atom.Close the periodic table to place the sodium atom on the canvas.