1. sacamos
2. trabajan
3. compra
4. uso
Answer:
yo me lllamo laurina
Explanation:
un gusto conocerte, estoy muy feliz
Iron has two kinds of valence number because, in order to attain stability it looses it two electrons in the 4 orbital and then has 2 more valencies and since the half filled orbitals are more stable it loses one more electron from d orbital and has +3 valency.
