(20 13? Yimo, Qingdao) [Chemistry-Material Structure and Properties] The development of solar cells has entered the third generation. The third generation is the equalization of CIGS of copper, indium

(20 13? Yimo, Qingdao) [Chemistry-Material Structure and Properties] The development of solar cells has entered the third generation. The third generation is the equalization of CIGS of copper, indium, gallium and selenium. (1) copper is the 29th element, and the copper atom loses one electron and becomes cuprous ion, so there are 28 electrons outside the nucleus of cuprous ion. The electronic configuration formula of ground copper ion (Cu+) is [Ar]3d 10, so the answer is [ar] 3d10;

(2)As, Se and Br belong to the same period, and the number of atoms increases gradually. These three elements belong to VA, VIA and VIIA in turn. The first ionization energies of the VA group elements are greater than those of their neighboring elements, so the order of the first ionization energies of the three elements is BR > As > Se. ? The radii of As, Se and Br atoms decrease in turn, the attraction of atomic nucleus to outer electrons increases in turn, and the first ionization energy of elements increases in turn. The outermost electron configuration of Se atom is 4s24p4, and the outermost electron configuration of As atom is 4s24p3. P electron configuration is in a semi-filled state. According to the special case of Hunter's law, the semi-filled state is more stable, so the first ionization energy of As element is greater than that of se element.

So, the answer is: br > as > se? The radii of As, Se and Br atoms decrease in turn, the attraction of atomic nucleus to outer electrons increases in turn, and the first ionization energy of elements increases in turn. The outermost electron configuration of Se atom is 4s24p4, and the outermost electron configuration of As atom is 4s24p3. P electron configuration is in a semi-filled state. According to the special case of Hunter's law, the semi-filled state is more stable, so the first ionization energy of As element is greater than that of se element.

(3)BF3？ In NH3, atom B contains three σ bonds and one coordination bond, so its valence electron number is 4, and atom B hybridizes with sp3. In this compound, atom B provides an empty orbital atom and atom N provides a lone electron pair, so a coordination bond is formed between atoms B and N, so the answer is SP3；; Coordination key;

(4) Each carbon atom is connected with four silicon atoms, and each silicon atom is connected with three other carbon atoms, so the nearest number of C atoms around each C atom is 3×4= 12, so the answer is: 12.