Question

according to atomic structure, what determines which element will be the first and which will be the last in a period?​

Answer 1

Answer:

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Explanation:

according to atomic structure the factors which determine the element position in periodic table are 1. no of protons ie atomic number=less atomic number the element is placed first 2,.atomic size::size of element in creases down the group    3. atomic weight:in mendeleeves periodic table elements are placed according to their increasing atomic weights