[填空题]
1.On the axis below, skfxov20sp m):ibkc-1/xhaln2 etch the trend in first ionization xoi ga3jqukk9 o3 e8*4wcn4l- energies for the elements in the second peqa4nio c kk9x* 48weuj3 3lgo-riod.
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.