Figure 1.17 shows the values of IE₁ for the first 10 elements. 

(a) Label each point with the symbol of the appropriate element. 

(b) Give detailed reasons for the observed trend in values.

Figure 1.17.

Transcribed Image Text:

First ionization energy/kJ mol-¹ 2500 2000 1500 1000 500 72 دیا 1 6 9 T 10 8 Atomic number