08 noviembre 2011

ENLACE QUÍMICO

 ¡Cómo os conozco!

Tengo un curso muy bueno en 4º de ESO, pero tienen una debilidad: LES ENCANTA CANTAR, y a mi me encanta que les encante, asi es que ¿cual es el tema que estamos dando?  ¿ENLACES? Pues  ¡vamos a cantar!  (Debajo os pongo la letra, leedlo hasta el final)





Two atoms met on one fine day
One asked if he could bond
With the other atom there
Of whom he was really fond
The second atom shrugged and said
What´s your pleasure, son?
Are you up for electron transfer
Or electron-sharing fun!

Ionic or covalent?
What kind of bonds are these?
Involve valence electrons
And form compounds with ease!

Metal atoms lose electrons
And become a charge of plus
Nonmetals gain them happily
Look negative to all of us.
The opposite charged ions
Attract to make ionic bonds
The E.N.D. one point seven plus
They dissolve real well in ponds!

Ionic or covalent?
What kind of bonds are these?
Involve valence electrons
And form compounds with ease!

If the E.N.D. is point-five or more
And two nonmetals had
You have a polar covalent bond
One atoms happy, the others sad!
The atom with less E.N.
Gets a positive charge that´s slight
And the other, more greedy atom?
Slightly negative to our sight!

Ionic or covalent?
What kind of bonds are these?
Involve valence electrons.
And form compounds with ease!

If the E.N.D. is point-four or less
Two nonmetal atoms bond
With equal pull on electrons
Each atom is equal fond
No charges will develop
And, because of that, no poles
That´s why the bond is called non polar
On and on and on we roll!

Ionic or covalent?
Now its easy for you to tell
Just look up the E.N.D.
And you will do real well!



 Esta entrada está especialmente dedicada a todos MIS NIÑ@S DE  4º de ESO, tanto a los que les doy clase, como a los que no.

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