Chapter 4- Metals

Question 1

what are the properties of metals

Answer 1

lustrous, malleable, ductile, conductor of heat and electricity, high density generally, high melting point

Question 2

what are the atomic properties of metals

Answer 2

found on LHS of PT, low ionisation energies and electronegativities, larger atomic radius/lower core charge, form cations when bonding, will have 1,2,3 valence electrons

Question 3

what is metallic bonding

Answer 3

the metal atoms arrange themselves into a lattice, then release the outer shell electrons which form a sea of negative charge

Question 4

what are the limitations of the metallic bonding model

Answer 4

1- the range of melting points, hardness and densities of different metals
2- differences in electrical conductivity of metals
3- magnetic nature of some metals

Question 5

what are unreactive metals described as

Answer 5

inert

Question 6

how do you determine the relative reactivity of metals

Answer 6

you need to look at what occurs when they are exposed to water, oxygen and acids.

Question 7

what group of metals rapidly react with oxygen

Answer 7

group 1

Question 8

what group of metals reacts with oxygen to form oxides but not as rapidly, and what is needed to start this reaction

Answer 8

group 2, heat is needed

Question 9

what is a linear economy

Answer 9

where products are ultimately destined to become waste

Question 10

what is a circular economy

Answer 10

aims for optimal use and reuse of resources from the extraction of raw materials to production and consumption