Ayuda porfa Escribe la configuración electrónica de los elementos que poseen, ¿de qué elementos se trata?:
1) 15 electrones
2) 27 electrones
3) 56 electrones
4) 49 electrones

Oil rich countries in the middle east cover about 4% of earths total land area but prossess about 48% of the worlds known oil reserves what is the main reason for high concentration of reserves in this part of the world