[填空题]
1.On the axis below,*uq vsgt6e* 0yg hp (dxs9f yxe6;90cuv:wsc 9 wc/ 1q0a.eedx sketch the trend in first ionization energies for the elements in t cxeq wesac:d9/1v0w .he second period.
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.