spin238Spin; 238 U: 4.468(6) × 10 9 a: 0+ Isotones and Isobars The following table shows the atomic nuclei that are isotonic (same neutron number N = 146) and isobaric (same nucleon number A = 238)Spin Challenge Hub 238, Las Vegas, Texas. 45 likes. The battlefield awaits! Spin Royale Arena Like + share, invite your friends and fht for fortune!