<p>Argon has 3 stable isotopes, Ar36, Ar, 38 and Ar, 40. </p>
<p>The valence is 0 as can be seen here represented by only green cappings / neutral endings.</p>
<p>Argon is the third noble gas after Helium and Neon. </p>
<p>Argon has 3 stable isotopes, Ar36, Ar, 38 and Ar, 40. </p>
<p>The valence is 0 as can be seen here represented by only green cappings / neutral endings.</p>
<p>Argon is the third noble gas after Helium and Neon. </p>