Question

what happens to electrons when elements combine ​

Answer 1

Answer:

When atoms combine they gain, lose or share electrons in such a way that the outer shells become chemically complete. ... The valence of an element is the number of electrons the elements gain or loses when it forms compounds with other elements. Electrons in the outermost shell are called valence electron

Answer 2

Answer:

When atoms combine they gain, lose or share electrons in such a way that the outer shells become chemically complete. ... The valence of an element is the number of electrons the elements gain or loses when it forms compounds with other elements. Electrons in the outermost shell are called valence electron