Transition elements

Electron configuration for Cr is 4s¹3d⁵ and NOT 4s²3d⁴. Why?

• Half filled 3d orbital is more stable

• 4s¹ is more stable than 4s²

• Fully filled orbital is more stable

• 3d⁵ is more stable than 3d⁴

Tags

NGSS.HS-PS1-1

Which of the followings is NOT a chemical property of transition metal?

• Formation of complex ion

• Variable oxidation states

• Different shapes

• Formation of coloured complexes

Transition metals have variable oxidation states due to

• ability to lose electron from 3d and 4s

• ability to form complex ion

• ability to lose electrons from 4s

• ability to react with ligands

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Complex metal ions shown in diagram below are made up of

• ligands only

• transition metals

• different ligands

• ligands and transition metal

Which of the following is FALSE about complex ion shown in diagram below?

• 
  Overall charge is 2-

• CI^- ion acts as ligand

• Cu²⁺ acts as a transition metal ion

• Covalent bonding between Cu²⁺ and ligands

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

State the charge on the metal ion complex [Cu(Cl₂)]^- shown in diagram below.

• 1

• +1

• -2

• +2

Tags

NGSS.HS-PS1-1

Which of the following statement is FALSE about ligand?

• 
  It can be neutral or negative charge species

  
  

• 
  It is an electron donor

• It form dative bond with metal ion

• It is a Bronsted-Lowry acid

Which of the following statement is FALSE about ligand displacement?

• ethane-1,2-diamine is more stable than H₂O

• Ligands can form dative covalent bonds with transition metal ions

• Ligands are lone pair donors

• A more stable ligand will have a smaller Ksp value than the less stable ligan

What atom matches this electron configuration?
1s²2s²2p⁶3s²3p⁶4s²3d¹⁰

• Zinc

• Copper

• Nickel

• Germanium

Tags

NGSS.HS-PS1-1

Which of the following d-block elements is not a transition element?

• 
  Iron

• Scandium

• Titanium

• Chromium