Chapter 4&5 Metals, Alloys And Macromolecules

Question 1

What is the arrangement & structure of metals? How does it affect them?

Answer 1

• have a regular arrangement or layers of atoms.
• in a giant metallic lattice structure held together by positive [metal] ions in a sea of delocalised mobile electrons
• layers of atoms slide past one another easily
• malleable and ductile

Question 2

What is metallic bond?

Answer 2

It is the mutual electrostatic attraction between positively charged ions in a metal and the sea of delocalised mobile electrons

Question 3

What about alloys?

Answer 3

• is the mixture of a metal with one or more other elements
• different sizes, disrupts the regular lattice arrangement of pure metals
• stronger and harder than pure metals

Question 4

What are macromolecules?

Answer 4

They are polymers, made up of covalent substances joined together into chains of much larger molecules

Question 5

Characteristics of macromolecules?

Answer 5

• They vary in hardness and flexibility
• Do not have a fixed melting or boiling point
• soften over a range of temperatures when weak intermolecular forces are overcome by the molecular vibration with high kinetic energy
• insoluble in water but soluble in organic solvent
• do not conduct electricity