Final answer:
The student's question involves predicting the formulas of new combinations of elements to form binary ionic compounds. The correct formulas are based on the charges of the ions, aiming for a neutral overall charge. Examples include KCl for potassium + chlorine, AlF3 for aluminum + fluorine, and SnO2 for tin + oxygen.
Step-by-step explanation:
The student is asking for the predicted formulas of new chemical combinations by replacing elements in known compounds utilizing the rules for writing formulas of binary ionic compounds. The key to solving this problem is to balance the charges of the ions so that the overall charge of the compound is neutral. When predicting the formulas, we need to consider the valency or oxidation states of the elements involved. For example, if potassium (K) replaces sodium (Na) in sodium chloride (NaCl), since both have a +1 charge, the new formula would be KCl. Following a similar process, substituting aluminum (Al) for aluminum in aluminum fluoride (AlCl3) with fluorine (F), considering aluminum has a +3 charge and fluorine has a -1 charge, results in the formula AlF3. The charge of tin (Sn) is +2 or +4, but when combined with oxygen (O), which has a -2 charge, a likely compound could be SnO2, assuming tin is in the +4 oxidation state.
Let's predict the remaining chemical formulas based on the initial list:
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- Potassium (K) + Chlorine (Cl): KCl
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- Aluminum (Al) + Fluorine (F): AlF3
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- Tin (Sn) + Oxygen (O): SnO2
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- Calcium (Ca) + Bromine (Br): CaBr2
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- Cesium (Cs) + Iodine (I): CsI
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- Silicon (Si) + Bromine (Br): SiBr4