Question

how does valancy of element varry across period​

Answer 1

Answer:

Valency decreases as we go across a period from left to right

Answer 2

Answer:

hello please like my answer

Explanation:

Answer: The valency of an element is dependent on the number of electrons in the outermost shell of the electron. In a group all constituting elements will have the same valency because they all have the same number of electrons in the outer shells. Across the a period, the number however increase by 1.