Formula new combination predicted formula cu₂o silver + oxygen ag₂o nacl potassium + chlorine alcl₃ aluminum + fluorine co₂ tin + oxygen mgcl₂ calcium + bromine hcl cesium + iodine ccl₄ silicon + bromine

Formula     New Combination                    Predicted Formula


NaCl            potassium + chlorine                KCl

AlCl₃            aluminum + fluorine                AlF₃

CO₂             tin + oxygen                              SnO₂

MgCl₂          calcium + bromine                   CaBr₂

HCl              cesium + iodine                       CsI

CCl₄              silicon + bromine                     SiBr₄

Explanation:

1) The question is incomplete. The first part is missing.

This is the first part of the question.

Applying the principle that the elements of a particular column in the Periodic Table share the same chemical properties, complete the following chart. The first one has been done for you.


2) This is the given chart:

Formula     New Combination                    Predicted Formula


Cu₂O          silver + oxygen                         Ag₂O   ← this is the example.

NaCl            potassium + chlorine 

AlCl₃            aluminum + fluorine 

CO₂             tin + oxygen 

MgCl₂          calcium + bromine 

HCl              cesium + iodine 

CCl₄              silicon + bromine

3) This is how you find the new formula to complete the chart.

i) NaCl            potassium + chlorine 

Since potassium is in the same group of sodium, you predict that in the new formula Na is replaced by K giving KCl.

ii) AlCl₃            aluminum + fluorine 

Since fluorine is in the same group that Al, then you predict that in the new formula Cl is replaced by F leading to AlF₃

iii) CO₂             tin + oxygen 

Since tin is in the same group that C, you predict that in the new formula C is replaced by Sn leading to SnO₂

iv) MgCl₂          calcium + bromine 

Since calcium is in the same group that Mg, and bromine is in the same group that Cl, you predict thea in the new formula calcium replaces Mg and bromine replaces Cl, leading to CaBr₂

v) HCl              cesium + iodine 

Since H is in the same column that cesium and Cl is in the same colum that iodine, you predict that in the new formula Cs replaces H and I replaces Cl leading to: CsI

vi) CCl₄              silicon + bromine


Since silicon is in the same column that C and bromine is in the same column that Cl, you predict that in the new formula Si replaces C and Br replaces Cl, leading to SiBr₄

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