SCS Yr 13 Chem Group 3

Identify the electron deficient molecule

• NaCl
• MgCl₂
• AlCl₃
• CCl₄

Identify the non electron deficient molecule

• KCl
• BeCl₂
• AlCl₃
• BF3

Identify the correct definition for "electron deficiency".

• A species which does not have the full octet of electrons
• An atom in a compound which does not have the full octet
• A species which exceeds the octet of electrons
• _{An atom in a compound which does have the full octet}

Identify the compound with a stable octet

• AlCl₃
• BeCl₂
• Al₂Cl₆
• BF₃

Identify the electron deficient molecule

• BF₃NH₃
• MgCl₂
• Al₂Cl₆
• BF₃

Identify the compound that contains a co-ordinate bond

• NaCl
• MgCl₂
• AlCl₃
• BF₃NH₃

Identify the correct formula for boron nitride

• BeN
• BN
• Bn
• BN₂

Cubic boron nitride is isoelectronic to......

• Diamond
• Graphite
• Lead
• Carbon

Hexagonal boron nitride is isoelectronic to.....

• Diamond
• Lead
• Graphite
• Carbon

Boron nitride is a good insulator because..

• B has a higher electronegativity than N so holds onto the electrons
• N has a higher electronegativity than B so holds onto the electrons
• It has delocalised electrons
• It has an unbondeed p-orbital to form 4 bonds N.