Trends in Transition Elements and Atomic Sizes Quiz

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What happens to the atomic radii as we move along the 3d series?

Increase rapidly

Remain constant

Decrease less rapidly (correct)

Decrease rapidly

Why do ionization energies increase only slightly along the 3d series?

Decrease in nuclear charge

Addition of more electrons to 4s orbital

Formation of highly charged ions

Increase in shielding effect by 3d electrons (correct)

Which configuration do the doubly or more highly charged ions in the d-block have?

Only s-electrons

Both s and d electrons

No 4s electrons (correct)

Only d-electrons

Why is there a general trend of increasing values of second ionization enthalpy as the effective nuclear charge increases?

One d electron does not shield another electron effectively Signup and view all the answers

The trend of steady increase in second and third ionization enthalpy breaks for the formation of which ions?

Mn2+ Signup and view all the answers

Which factor is responsible for the value of ionization enthalpy?

Attraction of electrons towards nucleus, repulsion between electrons, and exchange energy Signup and view all the answers

Why does ionization enthalpy generally increase along a period in the periodic table?

Due to the increase in the effective nuclear charge. Signup and view all the answers

Why are transition elements known for forming colored compounds?

Due to the presence of multiple oxidation states. Signup and view all the answers

Which factor contributes the most to the stability of higher oxidation states in transition metals?

The ability to form multiple bonds. Signup and view all the answers

Why do transition metals have higher melting points compared to main group elements?

Due to the involvement of d electrons in metallic bonding. Signup and view all the answers

Why do lanthanoids generally have higher ionization enthalpies compared to actinoids?

Due to the presence of f electrons in lanthanoids. Signup and view all the answers

Why does copper not replace hydrogen from acids?

Copper has a positive E∘ value, making it more reactive than hydrogen. Signup and view all the answers

Why are the E- values for Mn, Ni, and Zn more negative than expected?

The metals quickly lose electrons and get oxidized. Signup and view all the answers

What is the reason behind the general trend of increasing values of second ionization enthalpy as the effective nuclear charge increases?

The formation of doubly charged ions in the d-block. Signup and view all the answers

How do the properties of Mn2+ and Zn2+ ions relate to their respective E- values?

Mn2+ and Zn2+ have half-filled and fully filled d orbitals respectively. Signup and view all the answers

Why does copper have a positive E∘ value compared to hydrogen?

Copper's d-orbitals are completely filled. Signup and view all the answers