Which of the following sets of four quantum numbers (n, l, ml, ms) correctly describes an electron occupying a d orbital of an element in the sixth row of the periodic table?

What volume of 0.745 M Na2CO3 (106 g/mol) solution contains 50.3 g of Na2CO3?

What volume of 2.52 M HCl is required to prepare 176.5 mL of 0.449 M HCl?

  Fill in the blanks.  Given the formula, determine the name of the following compounds.  Make sure to following the naming rules for ionic compounds, covalent compounds, and acids. Formula Name MgCO3 [A] SO4 [B] SiF6 [C] BBr3 [D] (NH4)2SO4 [E] Ni(NO3)2 [F] CrCl2 [G]  

An atom of which of the following elements has the smallest first ionization energy?

Which of the following is a weak acid in aqueous solution?

What are the products of the following reation?2NaOH(aq) + Cu(NO3)2 (aq) ®

Which of the following electron configurations is impossible, according to the Pauli exclusion principle?

A student is given a sample in lab that contains one of the ions listed below. After adding a few drops of AgNO3 solution to a portion of the unknown sample, the student observed a grayish precipitate. After adding a few drops of Mg(NO3)2 solution to another portion of the unknown sample, the student got a black precipitate. Based on these observations, what is the only possible ion in this student’s sample?

The ground-state valence-shell configuration of a particular atom is 5s2 4d10 5p1.  The element to which this atom belongs is a