(a(i))[3]
Describe how these sodium isotopes are alike and how they differ in the total numbers of protons, neutrons and electrons in each.\n\nalike\n\nnot the same
(a(ii))[1]
Why does each of the three isotopes have a total charge of zero?
(a(iii))[2]
Why do all three isotopes show the same chemical properties?
(a(iv))[1]
Why is the charge on sodium ions +1?
(b(i))[1]
Name two forms of carbon that have giant covalent structures.
(b(ii))[1]
Name the oxide of carbon that is a toxic gas.