Unit Test Answers

You probably already know the names of some molecules. Identify which compound (water, salt, carbon dioxide, or methane) corresponds to each of the following chemical formulas.H2O is .

CO2 is .

NaCl is .

CH4 is .

Steel:

Propane:

Calcium chloride:

Water:

Classify the type of force, attractive or repulsive, between the following pairs of particles:Electron-electron:

Electron-proton:

Proton-proton:

Chloride ion (Cl-)-sodium ion (Na+):

Which atom attracts electrons more strongly?

Which atom loses an electron more readily?

Which atom attracts electrons most strongly when bonded?

Electronegativity difference of Na and F:

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Electronegativity difference of Mg and O:

Electronegativity difference of C and H:

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