# Atomic Structure Quiz

## Make sure to try these on a piece of paper first

#2-1 Paper 1 Difficulty: Medium

Chlorine has two naturally occurring isotopes with the natural abundances shown below:

Isotope Natural abundance (%)
${}^{37}Cl$ 25%
${}^{35}Cl$ 75%

What is the correct relative atomic mass of chlorine.
A. 36
B. 35.47
C.35.50 $g.mol^{-1}$
D. 35.50

#2-2 Paper 2 Difficulty: Medium

This question is part of the Chemistry Online Revision Course
(but keep in mind that at least the first question of each topic is free!)