Give the number of electrons that are needed to fill a 4f subshell.

The more precisely the position is known the less precisely the momentum of the electron is known. Which of these is the designation for the above statement?

Which of these has unpaired electrons on the central atom?

Based on Coulombic forces of attraction, which of these would be expected to be the hardest to dissolve and have the highest melting point?  Apply Coulomb’s law based on the charges of the ions. Consider lattice energies. Ignore the sizes of the ions.

Which of these elements is not in the family or group indicated?

Metals react with oxygen to give oxides with the general formula MxOy. Write a balanced chemical equation for the reaction of iron with oxygen to yield iron(III) oxide.

Based on Coulombic forces of attraction, which of these would be expected to be the hardest to dissolve and have the highest melting point?  Apply Coulomb’s law based on the charges of the ions. Consider lattice energies. Ignore the sizes of the ions.

Metals react with oxygen to give oxides with the general formula MxOy. Write a balanced chemical equation for the reaction of iron with oxygen to yield iron(III) oxide.

Which term below fits this definition: ”A measure of the relative tendency of an atom to attract electrons to itself when chemically bonded to another atom?” Beryllium has a value of 1.5.

If 23.45 mL of 0.115 M NaOH are required to react with 10.00 mL of H2SO4 according to the reaction below, what must be the molarity of the acid?    HINT: M1V1/(M2V2) = n1/n2    2 NaOH   +  H2SO4  à  Na2SO4   +  2H2O(l)