Sodium and fluorine are both reactive elements. Two atoms are described. F Na atomic number 9 11 nucleon number 19 23 Which statements about these two atoms, and the ions they can form, are correct? 1 One Na atom has two more protons than one F¯ ion. 2 One Na atom has two more neutrons than one F atom. 3 One Na⁺ ion has the same number of electrons as one F¯ ion.

In which species are the numbers of protons, neutrons and electrons all different?

Which ion has more electrons than protons and more protons than neutrons? [H = ¹H ; D = ²H ; O = ¹⁶O]

Use of the Data Booklet is relevant to this question. In which pairs do both species have the same number of unpaired…

Which substance does not produce a poisonous gas, when burnt in a limited amount of air?

Use of the Data Booklet is relevant to this question. A sample of propyl ethanoate is hydrolysed by heating under ref…

When 1-bromopropane is treated in succession with two reagents, X and Y, it produces propanoic acid. What are reagent…