An element has an atomic mass number of 16 and an actomic number of 7

Answer: No such element exists. The element with the atomic number 7 is Nitrogen, which has an atomic mass of 14. The element with the atomic number 8, has an atomic mass of 16.

Explanation: On the period table, each element is allocated a block, within which lies all of its information. In the center is the symbol that represents the element, and underneath that, the name of the element. There are also three numbers: the top left number indicates the atomic number, the top right number indicates its electronegativity, and the number at the bottom indicates its atomic mass.