transition metals & coordinate chemistry

Which of the transition metals is the best conductor of heat and electric current?

• copper

• silver

• gold

• titanium

• tungsten

Why do transition metals show a lot of chemical similarities within a given period?

• The valence s and p electrons affect their chemistry more so than the inner d and f electrons, which do not participate in bonding as easily.

• The number of electrons within a given period varies only slightly and is sometimes identical because these metals have more than one ionic form.

• All elements in a given period, including the representative elements, have a lot of chemical similarities due to the gradual increase in atomic number

• The transition metals always fill their s and p orbitals first before filling their d orbitals, which affects their chemistry.

• None of the answers are right

What is the maximum oxidation state expected for vanadium?

• +5

• +8

• +6

• +4

• +3

What is the electron configuration of the Mn(II) ion?

• [Ar] 4s²3d⁵

• [Ar] 3d⁵

• Ar] 4s¹3d⁵

• [Ar] 4s²3d³

• none of these

What is the electron configuration of the Sc(I) ion?

• [Ar] 4s¹4d¹

• [Ar] 4s¹3d¹

• [Ar] 3s¹3d¹

• [Ar] 4s²

• [Ar] 3d²

What is the electron configuration of the Ni(II) ion?

• [Ar] 4s²3d⁶

• [Ar] 4s¹3d⁷

• [Ar] 4s²3d⁸

• [Ar] 3d⁸

• none of these

Which of the metal ions in the following complex ions has a d⁵ electron configuration?

• V(H₂O)₆²⁺

• Mo(NH₃)₆³⁺

• Co(CN)₄^–

• Fe(CN)₆^3–

• RhCl₆^4–

What are the oxidation numbers of each central metal atom in the following coordination compounds?

K₃[Fe(CN)₆], [Cr(NH₃)₄Br₂]Br, [Ni(H₂O)₆]Cl₂, Na₂[TaF₇]

• 3, 3, 3, 5

• 3, 3, 2, 7

• –3, 3, 2, 5

• –3, 1, 2, 5

• 3, 3, 2, 5

Ethylenediamine (en) is a bidentate ligand. What is the coordination number of cobalt in [Co(en)₂Cl₂]Cl?

• 4

• 5

• 6

• 7

• 8

Which of the following coordination compounds will form a precipitate when treated with an aqueous solution of AgNO₃?

• [Cr(NH₃)₃Cl₃]

• [Cr(NH₃)₆]Cl₃

• [Cr(NH₃)Cl]NO₃

• Na₃[Cr(CN)₆]

• Na₃[CrCl₆]