Respuesta :

kenmyna
the  outermost  electron  located  in  the   outermost  shell  of  an  atom  is  called  valence  electrons. Valence  electrons  participate  in  formation  of chemical  bond  if  the  outer  shell  are  not  closed.  IN  a  covalent  bond  both  share  contribute  one valence  electron.
camlee5
Electrons located in the outermost shell of an atom are called valence electrons. The outermost electrons are involved in chemical reactions. The electrons in the outer shell determine the reactivity of the element. For example, potassium (2,8,8,1) has one valence electron.

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