d-Block Elements And Transition Elements

Question 1

What two d-block elements are not transition elements?

Answer 1

Scandium and ZInc

Question 2

Why are scandium and zinc not considered transition metals?

Answer 2

Because their properties are quite different to those of the other eight elements

Question 3

What are the three main characteristics of transition metals?

Answer 3

Transition metals have variable valency

Transition metals usually form coloured compounds

Transition metals are widely used as catalysts

Question 4

Transition metals have variable valency, how do scandium and zinc differ from these?
(2)

Answer 4

Scandium only forms Sc^3+ ions

Zinc only forms Zn^2+ ions

Question 5

Transition metals usually form coloured compounds, how does scandium and zinc differ from these?

Answer 5

Scandium and zinc only form white compounds

Question 6

Transition metals are widely used as catalysts, how does scandium and zinc differ from these?

Answer 6

Scandium and zinc show little catalytic activity

Question 7

Define a transition metal.

Answer 7

A transition metal is one that forms at least one ion with a partially filled d sublevel

Question 8

Why are scandium and zinc excluded from the transition metals, according to the definition of a transition metal?

Answer 8

Neither Sc^3+ nor Zn^2+ has a partially filled sublevel