(a)[2]
Arrange the four metals in order of reactivity, starting with the one that is most reactive.
(b)[2]
Describe two differences between the physical properties of cobalt and lithium.
(c(i))[1]
Describe what the term alloy means.
(c(ii))[2]
Name the two metals present in brass.
(c(iii))[1]
Give one use of stainless steel.
(d(i))[3]
Deduce the number of protons, neutrons and electrons in the cobalt ion shown, $^{60}_{27}\text{Co}^{3+}$.
(d(ii))[1]
State the charge on a neutron.