2.  http://eltamiz.com/wp-content/uploads/2008/02/silicio1.jpg
 http://panelessolarescaseros.net/wp-content/uploads/2012/05/Silicon-Negro.jpeg

3.  http://www.sc.ehu.es/sbweb/electronica/elec_basica/tema2/images/circuitos/Cris_Si/T2Cris_Si1.gif
 http://solete.nichese.com/solete-gif/estructura.jpg

4.  Carburo de Silicio, y Chips de computadoras
 http://2.bp.blogspot.com/_zpq4XUzOMzQ/StCwF164EcI/AAAAAAAAArY/_HIzMX5l26s/s320/14+SI
LICIO.jpg
 http://www.apceram.com/imatges/galeria_materiales/carburo.jpg

5.  http://remediosnaturales.org/imagesNotas/germanio.jpg
 http://www.waydn.com/answers/wp-content/uploads/germanio.gif

6.  http://www.electronica2000.net/curso_elec/imagenes/atomo_germanio.gif
 http://dc190.4shared.com/doc/EgT-ts6I/preview_html_m64822daa.png

7.  Fibra Optica y Diodos Led
 http://www.zancajo.com/wordpress/wp-content/uploads/2011/07/diodos.jpg
 http://domingoguzmanlopez.bligoo.com.ve/media/users/17/852714/images/public/161607/1351
781045853-domingo.jpg?v=1351790515598

8.  http://www.quimlab.com.br/guiadoselementos/galio/galio4.jpg
 http://3.bp.blogspot.com/_rQ7K_lauh44/SxT37VdztSI/AAAAAAAAAHY/6-
nYo0xWIL0/s1600/Gallium1_640x480.jpg

9.  http://4.bp.blogspot.com/-
ZnpZ5OCLdZw/UEkQuiSJP2I/AAAAAAAAIQI/TyZfhqtxBEQ/s1600/Galio+seg%C3%BAn+el+
modelo+at%C3%B3mico+de+Sommerfeld.png
 http://www.mcgraw-hill.es/bcv/tabla_periodica/imagenes/elemento31.gif

10.  Termómetros ecológicos y diodos Led
 http://www.ofiled.com/wp-content/uploads/2011/02/Que-es-un-led.jpg
 http://blog.sercomex-emergencias.com/wp-content/uploads/2011/06/termometro-galio.jpg