Question

The relative atomic mass of an element is the mass of its atoms compared with that of which element?

Answer 1

left to right the atomic number increases by 29.

Explanation: for example

Choose two elements to compare. __K________ and __V________

What are their atomic numbers? ____39_______ and __50________

Answer 2

In calculating the relative atomic mass of an element with isotopes, the relative mass and proportion of each is taken into account. For example, naturally occurring chlorine consists of atoms of relative isotopic masses 35 (75%) and 37 (25%). Its relative atomic mass is 35.5.