Transition elements

Question 1

Transition element definition

Answer 1

And block element that forms one or more stable ions with an incomplete d subshell

Question 2

Electronic configuration of scandium with [Ar]

Answer 2

3d1 4s2

Question 3

Electronic configuration of Zinc with [Ar]

Answer 3

3d10 4s2

Question 4

Chromium configuration

Answer 4

1s2 2s2 2p6 3s2 3p6

Question 5

Copper

Answer 5

1s2 2s2 2p6 3s2 3p6 3s2 3p6 3d10 4s1

Question 6

Features of transition elements

Answer 6

• Variable oxidation states
• Colorful compounds
• Used as catalysts
• Complex ions/compounds

Question 7

Why do they have variable oxidation states

Answer 7

• similarity in the energy of the 3d & 4s atomic orbitals

Question 8

Why does an element have a have a - as maximum oxidation state?

Answer 8

It involves all of the 4s and 3d electrons in the atom

Question 9

Why aren’t zinc and scandium transition element

Answer 9

Scandium has no electron fully satisfy the definition of transition elements
Zinc has a a completely full 3d subshell

Question 12

Stability constant definition

Answer 12

The equilibrium constant for the formation of a complex ions in a solvent from its constituent ions or molecules

Question 13

Ligand

Answer 13

A molecule or ion with one or more lone pairs of electrons which form dative covalent bonds to central transition element atom or ion.

Question 14

Complex ion

Answer 14

A central transition metal ion surrounded by ligands, bonded to the central ion by dative covalent bonds.

Question 15

Coordination number

Answer 15

No. of dative bonds formed by a ligand with a transition metal ion in a complex.

Question 16

Bidentate ligand

Answer 16

A ligand that forms two dative bonds with a transition metal ion in a complex.

Question 17

Monodentate ligand

Answer 17

A ligand forming one dative bond with a transition metal ion in a complex.