chistes



sábado, 9 de abril de 2011

Chemical Properties

compund : a chemical combination of two or more elements.




chemical bond : a link that aoms or electrical charge particles can forms with each others.



chemical formual :  a way of using letters an nubers to show how much of each element is in a substance.




ion : an electrical charge particle with unequal numbers of protons and electrons.




molecule : a group of abandoned atoms act like a single particle.






chemical properties : a way of discribing how a substance change chemicaly with other substance.




exothermic : a reaction that give the heat.




endothermic : a reactuion that absorbed heat.

 


2 comentarios: