I’d say for the answer 13.13 mmHg?
Answer:
According to the modern periodic law, the properties of the elements and their compounds are a periodic function of their atomic numbers. Thus, in the modern periodic table, atomic number forms the basis of the classification of elements;The modern table is called 'long form' of the periodic table.
hope this helps
Because its only representing the most stable isotope of that element but its considered the atomic mass and not average atomic mass
