2 lonic compounds contain ions. (a) The numbers of electrons, neutrons and protons in four particles, W, X, Y and Z,
are shown in Figure 5.
particle
electrons
neutrons
protons
W
9
10
9
х
10
14
12
Y
16
16
16
Z
18
18
16
Figure 5
Explain which particle, W, X, Y or Z, is a negative ioa.
(2)