Unit 1: Structure And Bonding

Question 1

Elements present in Metallic Bonding

Answer 1

Metals

Question 2

Elements present in Covalent Molecular bonding

Answer 2

N², H², O², Br², F² (diatomic molecules), S⁴, P⁸, C⁶⁰

Question 3

Elements present in Covalent Network bonding

Answer 3

C, B, Si (graphite, diamond)

Question 4

Elements present in monatomic bonding

Answer 4

Noble gases (they cannot form bonds with other atoms as they have full stable electron shells)

Question 5

Which type of molecules can conduct

Answer 5

Metallic, (unless graphite in networks) due to delocalised electrons

Question 6

Which have high mp and bp

Answer 6

Metallica and covalent network

Question 7

Pure/non-polar covalent bonding

Answer 7

No ionic character, equal attraction, diatomic molecules, symmetrical, most carbon compounds, <0.5, (oils, fats, O2, N2, H2, noble gases, alkenes and alkanes)

Question 8

Polar covalent bonding

Answer 8

Unevenly distributed, >0.5, between pure and ionic bonding on atom differences in molecules (H2O, alcohols, carboxylic acids, aldehydes, ketones)

Question 9

Ionic bonding

Answer 9

Largest ionic character, >1.7, high mp and bp (NaCl, KCl)

Question 10

London dispersion forces

Answer 10

Occurs in a lot of molecules, but is the only intramolecular force in non-polar/pure covalent bonds, weakest force

Question 11

Permanent dipole permanent dipole interactions

Answer 11

Electrostatic attraction between two polar molecules (oppositely charged ends of molecules)

Question 12

Hydrogen bonding

Answer 12

Occurs between Hydrogen and Nitrogen, Oxygen and Fluoride. Strongest bonding