Although the position of the presubscript and presuperscript is graded for accuracy, you are not graded on the order in which you enter these.To represent, type either _Z^AX or ^A_ZX.( presuperscript) and mass number ( presubscript) For example, to represent carbonate CO 3 2-, type CO_3^(2). For an ionic molecule or formula: The superscript indicating the charge must come at the very END of the molecular formula.For example, to represent a cobalt atom with two extra electrons (Co 2-), type Co^ (2-). For example, to represent a hydrogen atom missing its electron (H+), type H^+.Įnter a minus sign (-) after the caret (for superscript). For two or more digits in a superscript:įollow the caret symbol with the digits in parentheses, such as ^(12).Įnter the plus sign (+) after the caret (for superscript). For example, to represent H 2type H_2.įollow the underscore with the digits in parentheses, such as _(110).įollow the caret symbol with the number. To indicate.įollow the underscore with the number. If your answer box provides a chemical toolbar above the answer area: See alternate instructions. You must complete these kinds of questions on a computer, not on a mobile device. However, assignments in your course may require this type of keyboard-based "shorthand" for Mastering to correctly interpret your answers. Your answers will appear exactly as you as you type them (i.e., not as you might see in your textbook). Enter or edit chemical notation (simple answer box, no chemical toolbar)
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