D AND F BLOCK ONE SHOT REVISION 🔥 CLASS 12TH CHEMISTRY ｜｜ ONE SHOT REVISION D AND F BLOCK ELEMENT

What are the elements in the d block of the periodic table?

Elements from group 3 to group 12.

Which series is primarily examined in d block questions?

The 3d series.

What is the electronic configuration format for d block elements?

3d and 4s.

What is the exception for chromium's electronic configuration?

3d^5 4s^1 instead of 3d^4 4s^2.

What determines an element to be a transition element?

An incompletely filled d orbital.

What is the trend in atomic radius in d block elements?

It generally decreases, remains similar, then slightly increases.

How does a decrease in atomic radius affect density in d block elements?

Density increases as atomic radius decreases.

What is ionization energy?

The energy required to remove an electron from an atom.

What is the significance of half-filled and fully filled d orbitals?

They are more stable configurations.

What are the common oxidation states of lanthanides?

They generally show +3 oxidation state.

What causes lanthanoid contraction?

The poor shielding effect of f electrons and an increase in nuclear charge.

What is the reason behind the similarity in size between 4d and 5d series elements?

Lanthanoid contraction causes their sizes to be similar.

What happens during the disproportionation of copper(I)?

Copper(I) can convert to copper(II) and copper(0).

What is the role of transition metals in catalysis?

They show variable oxidation states, allowing them to act as effective catalysts.

What is the electronic configuration for copper(II)?

3d^{10} 4s^1.

How do transition metals display color?

Due to d-d transitions between electronic energy levels.

What is the general trend for ionization enthalpy in transition metals?

It is irregular due to the influence of half-filled and fully-filled orbitals.

What is the primary reason for the stability of transition metal complexes?

Small size, positive charge, and vacant orbitals allow them to form complex compounds.

What is potassium dichromate's formula?

K2Cr2O7.

How can one obtain KMnO4?

Through a specific preparation process including steps which should be known.

What are the practical applications of interstitial compounds?

They are very hard and have high melting points.

What is the oxidation state range for actinides?

They show a wide range of oxidation states due to involvement of 5f, 6d, and 7s electrons.

Why are some transition metals not considered transition elements?

Because they have completely filled d orbitals.