B 2
is which shell are the valence electrons of the elements in period 2 found
Answer:
this is not a proper informative question
It would be the same thing if the Co does not have a number with it because it can’t reduce
El agua con hielo es sistema heterogénea .
Rows of elements are called periods. The period number<span> of an element signifies the highest unexcited energy level for an electron in that element.
</span>Columns of elements help define element groups<span>. </span>Elements within a group share<span> several common properties. Groups are elements have the same outer electron arrangement.</span>
