(a(i))[3]
Work out the number of protons, electrons and neutrons in this sodium isotope.
(a(ii))[1]
State one medical use for radioactive isotopes.
(b(i))[2]
Draw the electronic structure of a sodium atom.
(b(ii))[1]
State the name of the particle lost when a sodium atom forms a sodium ion.
(c(i))[2]
Complete the word equation for sodium reacting with water. sodium + water $\rightarrow$ [BLANK] + [BLANK]
(c(ii))[1]
The reaction of sodium with water is exothermic. What does exothermic mean?
(c(iii))[1]
When sodium reacts with oxygen, sodium oxide is produced. Is sodium oxide an acidic oxide or a basic oxide? Give a reason for your answer.
(d)[2]
Use the table of observations for reactions with cold and hot water to arrange the four metals calcium, lanthanum, manganese and uranium in order of reactivity, least reactive first.