Chemistry Transition metals

What is a typical chemical property of transition metals.

• Soft metal

• Hard metals

• low melting and boiling points

• only one oxidation state

Tags

NGSS.HS-PS1-1

Transition metals have typical metal properties due to the metallic bonds in the solid. Describe what is meant by the term ‘metallic bonding’.

• A lattice of negative metal ions in a ‘sea’ of delocalised (or free) electrons.

• A lattice of positive metal ions in a ‘sea’ of delocalised (or free) electrons.

• A lattice of positive non metal ions

• A lattice of negative non metal ions

Which statement best explains; what is meant by the term ‘complex ion’.

• A cation

• An ion with 6 electrons

• A anion

• A central metal ion surrounded by ligands.

What is the coordination number of this complex ion [Cu(H2O)6] 2+ ?

• 7

• 6

• 8

• 1

What is the correct electronic configuration of chromium?

• 1s22s22p63s23p64s13d5

• 1s22s22p63s23p64s23d4

• 1s22s22p63s23p63d14s4

• 1s22s22p63s23p63d104s2

State the electronic configuration for the Fe2+ cation.

• [Ar]3d4

• [Ar]3d2

• [Ar]3d6

• [Ar]3d7

The coordination number in a coordination compound refers to:

• the number of donor atoms surrounding the central metal atom in a complex ion.

• the number of electrons in the atom

• the number of donor atoms donated to the ligands.

• the number of metals present in the complex ion.

Why is zinc not considered a transition metal?

• Zinc is not a transition metal because it gains two 4s electrons to give a 2+ion with full d subshell levels.

• Zinc is not a transition metal because it loses four 4s electrons to give a 4+ion with full d subshell levels.

• Zinc is not a transition metal because it loses two 4s electrons to give a 2+ion with full d subshell levels.

• Zinc is not a transition metal because it gains two 4d electrons to give a 2+ion with full d subshell levels.

What will be shape of a K[CrF4] complex?

• square pyramidal

• octahedral

• square planar

• tetrahedral

Explain the shape of a K[CrF4] complex?

• it has four ligands bound to potassium and a coordination number of 1.

• it has four ligands bound to chromium and a coordination number of 4.

• it has four metals bound to potassium and a coordination number of 4.

• it has four metals bound to potassium and a coordination number of 2.