What is the mass number of the xenon isotope with

hat is the mass number of the xenon isotope with   neutrons?

An element X has four naturally occurring isotopes, with natural abundances and masses outlined in the table below. Mass (a.m.u) Natural Abundance (%)11.00 40.70 %13.00 39.30 %14.00 15.60 %16.00 4.40 %Calculate the atomic mass of element X, to two decimal places.

What is the equation for calculating the mass number of an isotope?

What is the formal charge for Xenon?

lement X has two isotopes. Their mass numbers are 69 and 71 The percentage abundance of each isotope is: • 60% of 69 X • 40% of 71 X Estimate the relative atomic mass of element X. [1 mark] Tick one box. < 69.5 Between 69.5 and 70.0 Between 70.0 and 70.5 > 70.5