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Write the formula for each compound. You can't enter subscripts and superscripts, so just type the numbers where they belong. For example, you would enter the formula for strontium phosphate, Sr\u2083(PO\u2084)\u2082, as Sr3(PO4)2.<\/strong><\/p>\n","overallFeedback":[{"from":0,"to":100}],"showSolutions":"Show solution","tryAgain":"Retry","checkAnswer":"Check","notFilledOut":"Please fill in all blanks to view solution","answerIsCorrect":"':ans' is correct","answerIsWrong":"':ans' is wrong","answeredCorrectly":"Answered correctly","answeredIncorrectly":"Answered incorrectly","solutionLabel":"Correct answer:","inputLabel":"Blank input @num of @total","inputHasTipLabel":"Tip available","tipLabel":"Tip","behaviour":{"enableRetry":true,"enableSolutionsButton":false,"enableCheckButton":true,"autoCheck":false,"caseSensitive":true,"showSolutionsRequiresInput":true,"separateLines":false,"confirmCheckDialog":false,"confirmRetryDialog":false,"acceptSpellingErrors":false},"scoreBarLabel":"You got :num out of :total points","confirmCheck":{"header":"Finish ?","body":"Are you sure you wish to finish ?","cancelLabel":"Cancel","confirmLabel":"Finish"},"confirmRetry":{"header":"Retry ?","body":"Are you sure you wish to retry ?","cancelLabel":"Cancel","confirmLabel":"Confirm"},"questions":["

calcium nitrate<\/strong> *Ca(NO3)2*<\/p>\n","

aluminum sulfite<\/strong> *Al2(SO3)3*<\/p>\n","

ammonium carbonate<\/strong> *(NH4)2CO3*<\/p>\n","

magnesium phosphate<\/strong> *Mg3(PO4)2*<\/p>\n","

barium nitride: <\/strong>*Ba3N2*<\/p>\n"],"media":{"disableImageZooming":false},"a11yCheck":"Check the answers. The responses will be marked as correct, incorrect, or unanswered.","a11yShowSolution":"Show the solution. The task will be marked with its correct solution.","a11yRetry":"Retry the task. Reset all responses and start the task over again.","a11yCheckingModeHeader":"Checking mode"},"library":"H5P.Blanks 1.14","metadata":{"contentType":"Fill in the Blanks","license":"U","title":"Day05_q7"},"subContentId":"105d0c24-3efe-49af-875b-043aa5761fe1"},"useSeparator":"auto"},{"content":{"params":{"panels":[{"content":{"params":{"text":"

Calcium nitrate<\/strong>: Calcium atoms can lose two electrons to achieve a noble-gas electron configuration, so calcium ions have a 2+ charge. Nitrate ion, NO\u2083\u207b, has a 1- charge. The formula for an ionic compound has the smallest whole-number ratio of the ions that gives an overall zero charge. Two 1- nitrate ions are required to balance the 2+ charge of one calcium ion.<\/p>\n\n

Aluminum sulfite<\/strong>: Aluminum is in group IIIA of the periodic table, with three valence electrons, and forms Al\u00b3\u207a ions. Sulfite is SO\u2083\u00b2\u207b with a 2- charge. Two aluminum ions gives 6+ charge and three sulfite ions gives 6- charge, so the formula is Al\u2082(SO\u2083)\u2083.<\/p>\n\n

Ammonium carbonate<\/strong>: Both ions are polyatomic. Ammonium ion, NH\u2084\u207a, has 1+ charge; carbonate ion, CO\u2083\u00b2\u207b, has 2- charge. Thus two ammonium ions balance the charge of one carbonate ion and the formula is (NH\u2084)\u2082CO\u2083.<\/p>\n\n

Magnesium phosphate<\/strong>: Magnesium is in group IIA of the periodic table and forms 2+ ions. Phosphate ion, PO\u2084\u00b3\u207b, has 3- charge. Three magnesium ions give 6+ charge and two phosphate ions give 6- charge so the formula is Mg\u2083(PO\u2084)\u2082.<\/p>\n\n

Barium nitride<\/strong>: :Barium is in group IIA of the periodic table and forms 2+ ions. Nitrogen is in group VA and can gain three electrons to form the nitride ion, N\u00b3\u207b, which has 3- charge. Three barium ions give 6+ charge and two nitride ions give 6- charge so the formula is Ba\u2083N\u2082.<\/p>\n\n

If you missed more than one of these, you need to review the names and charges of polyatomic ions or review valence electrons and formation of ions with noble-gas electron configurations.<\/strong><\/p>\n"},"library":"H5P.AdvancedText 1.1","subContentId":"5435df1b-d695-4162-9fdf-2fbe3c27ed2f","metadata":{"contentType":"Text","license":"U","title":"Day05_q7"}},"title":"After entering your responses and checking click here for an explanation."}],"hTag":"h2"},"library":"H5P.Accordion 1.0","metadata":{"contentType":"Accordion","license":"U","title":"Solution"},"subContentId":"91e3bde9-e66c-4eae-b6cd-9a949c582372"},"useSeparator":"auto"}]}

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