1. An ionic compound composed of chromium ions and oxide ions crystallizes into a face-centered cubic arrangement of chromium ions with oxide ions occupying all of the tetrahedral holes within the unit cell. What is the ionic formula for this compound? What are the oxidation states of the chromium and oxide ions? 2. Examine the ionic unit cell structure shown at right. The red spheres represent sulfide ions and the purple spheres represent nickel ions. Which ions define the unit cell? What kinds of "holes" are filled by the counter ions? What is the ionic formula for this compound?

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Analytical Tools

Analytical tools or analysis tools help one to get into a conclusion or results from the data collected. Analytical tools can be applied for simple data sets and also in the case of big data analytics.