Hey there,
Answer:
4 valence electrons.
Hope this helps :D
<em>~Top☺</em>
Mechanical twinning occurs in metals having body center cubic and hexagonal closed packed structures. Twinning is said to occur when a portion of a crystal takes up an orientation that is related to the orientation of the untwinned lattice in a definite symmetrical manner.
Bro mushrooms are pretty elite ngl