[填空题]
1.On the axis below, sketch tqov4: 5vncnd/ he trend i7iwbe )d dua-)n first ionization energies for the elements in the second p-ibe )7aud dw)eriod.
2. 1.Explain the general trend in first ionization energies.
2.Predict whether the first ionization energies for the third period elements will be their respective elements in the second period.