Sodium (Na) – Calcium (Ca)

  • Atomic Number: 11
  • Symbol: Na
  • Isotopes:
    • $^{18}$Na: Half-life is > 200 ns, decays via Proton Emission.
    • $^{19}$Na: Half-life is 42.1 ms, decays via Positron Emission and Proton Emission.
    • $^{20}$Na: Half-life is 447.9 ms, decays via Positron Emission.
    • $^{21}$Na: Half-life is 22.49 s, decays via Positron Emission.
    • $^{22}$Na: Half-life is 2.602 years, decays via Positron Emission and Electron Capture.
    • $^{23}$Na: Stable.
    • $^{24}$Na: Half-life is 14.959 h, decays via Beta Decay.
    • $^{25}$Na: Half-life is 59.1 s, decays via Beta Decay.
    • $^{26}$Na: Half-life is 1.0712 s, decays via Beta Decay and Neutron Emission.
    • $^{27}$Na: Half-life is 301 ms, decays via Beta Decay and Neutron Emission.
    • $^{28}$Na: Half-life is 30.5 ms, decays via Beta Decay and Neutron Emission.
    • $^{29}$Na: Half-life is 43.3 ms, decays via Beta Decay and Neutron Emission.
    • $^{30}$Na: Half-life is 53.7 ms, decays via Beta Decay and Neutron Emission.
    • $^{31}$Na: Half-life is 17.0 ms, decays via Beta Decay and Neutron Emission.
    • $^{32}$Na: Half-life is 8.2 ms, decays via Beta Decay and Neutron Emission.
    • $^{33}$Na: Half-life is 11.4 ms, decays via Beta Decay and Neutron Emission.
    • $^{34}$Na: Half-life is 5.5 ms, decays via Beta Decay and Neutron Emission.
    • $^{35}$Na: Half-life is 1.5 ms, decays via Beta Decay and Neutron Emission.
    • $^{36}$Na: Half-life is 2.5 ms, decays via Beta Decay and Neutron Emission.
    • $^{37}$Na: Half-life is < 120 ns, decays via Beta Decay and Neutron Emission.

Magnesium (Mg)

  • Atomic Number: 12
  • Symbol: Mg
  • Isotopes:
    • $^{20}$Mg: Half-life is 91.4 ms, decays via Positron Emission.
    • $^{21}$Mg: Half-life is 122 ms, decays via Positron Emission.
    • $^{22}$Mg: Half-life is 3.84 s, decays via Positron Emission.
    • $^{23}$Mg: Half-life is 11.317 s, decays via Positron Emission.
    • $^{24}$Mg: Stable.
    • $^{25}$Mg: Stable.
    • $^{26}$Mg: Stable.
    • $^{27}$Mg: Half-life is 9.458 min, decays via Beta Decay.
    • $^{28}$Mg: Half-life is 20.91 h, decays via Beta Decay.
    • $^{29}$Mg: Half-life is 1.30 s, decays via Beta Decay and Neutron Emission.
    • $^{30}$Mg: Half-life is 335 ms, decays via Beta Decay and Neutron Emission.
    • $^{31}$Mg: Half-life is 230 ms, decays via Beta Decay and Neutron Emission.
    • $^{32}$Mg: Half-life is 105 ms, decays via Beta Decay and Neutron Emission.
    • $^{33}$Mg: Half-life is 90.5 ms, decays via Beta Decay and Neutron Emission.
    • $^{34}$Mg: Half-life is 20 ms, decays via Beta Decay and Neutron Emission.
    • $^{35}$Mg: Half-life is < 260 ns, decays via Beta Decay and Neutron Emission.
    • $^{36}$Mg: Half-life is < 210 ns, decays via Beta Decay and Neutron Emission.

Aluminum (Al)

  • Atomic Number: 13
  • Symbol: Al
  • Isotopes:
    • $^{22}$Al: Half-life is 91.1 ms, decays via Positron Emission and Proton Emission.
    • $^{23}$Al: Half-life is 470 ms, decays via Positron Emission.
    • $^{24}$Al: Half-life is 2.053 s, decays via Positron Emission.
    • $^{25}$Al: Half-life is 7.183 s, decays via Positron Emission.
    • $^{26}$Al: Half-life is 7.17 x 10⁵ years, decays via Positron Emission and Electron Capture.
    • $^{27}$Al: Stable.
    • $^{28}$Al: Half-life is 2.24 min, decays via Beta Decay.
    • $^{29}$Al: Half-life is 6.56 min, decays via Beta Decay.
    • $^{30}$Al: Half-life is 3.60 s, decays via Beta Decay and Neutron Emission.
    • $^{31}$Al: Half-life is 644 ms, decays via Beta Decay and Neutron Emission.
    • $^{32}$Al: Half-life is 31.0 ms, decays via Beta Decay and Neutron Emission.
    • $^{33}$Al: Half-life is 41.7 ms, decays via Beta Decay and Neutron Emission.
    • $^{34}$Al: Half-life is 56.3 ms, decays via Beta Decay and Neutron Emission.
    • $^{35}$Al: Half-life is 38.6 ms, decays via Beta Decay and Neutron Emission.
    • $^{36}$Al: Half-life is 34.1 ms, decays via Beta Decay and Neutron Emission.
    • $^{37}$Al: Half-life is 10.7 ms, decays via Beta Decay and Neutron Emission.
    • $^{38}$Al: Half-life is 9.0 ms, decays via Beta Decay and Neutron Emission.
    • $^{39}$Al: Half-life is 7.6 ms, decays via Beta Decay and Neutron Emission.
    • $^{40}$Al: Half-life is < 260 ns, decays via Beta Decay and Neutron Emission.

Silicon (Si)

  • Atomic Number: 14
  • Symbol: Si
  • Isotopes:
    • $^{22}$Si: Half-life is 29 ms, decays via Positron Emission and Proton Emission.
    • $^{23}$Si: Half-life is 42.3 ms, decays via Positron Emission and Proton Emission.
    • $^{24}$Si: Half-life is 140 ms, decays via Positron Emission.
    • $^{25}$Si: Half-life is 220 ms, decays via Positron Emission.
    • $^{26}$Si: Half-life is 2.23 s, decays via Positron Emission.
    • $^{27}$Si: Half-life is 4.16 s, decays via Positron Emission.
    • $^{28}$Si: Stable.
    • $^{29}$Si: Stable.
    • $^{30}$Si: Stable.
    • $^{31}$Si: Half-life is 2.62 h, decays via Beta Decay.
    • $^{32}$Si: Half-life is 153 years, decays via Beta Decay.
    • $^{33}$Si: Half-life is 6.18 s, decays via Beta Decay.
    • $^{34}$Si: Half-life is 2.77 s, decays via Beta Decay.
    • $^{35}$Si: Half-life is 780 ms, decays via Beta Decay and Neutron Emission.
    • $^{36}$Si: Half-life is 450 ms, decays via Beta Decay and Neutron Emission.
    • $^{37}$Si: Half-life is 90 ms, decays via Beta Decay and Neutron Emission.
    • $^{38}$Si: Half-life is 62 ms, decays via Beta Decay and Neutron Emission.
    • $^{39}$Si: Half-life is 41 ms, decays via Beta Decay and Neutron Emission.
    • $^{40}$Si: Half-life is 30 ms, decays via Beta Decay and Neutron Emission.
    • $^{41}$Si: Half-life is 23 ms, decays via Beta Decay and Neutron Emission.
    • $^{42}$Si: Half-life is 16 ms, decays via Beta Decay and Neutron Emission.

Phosphorus (P)

  • Atomic Number: 15
  • Symbol: P
  • Isotopes:
    • $^{26}$P: Half-life is 43.7 ms, decays via Positron Emission and Proton Emission.
    • $^{27}$P: Half-life is 260 ms, decays via Positron Emission and Proton Emission.
    • $^{28}$P: Half-life is 270.3 ms, decays via Positron Emission.
    • $^{29}$P: Half-life is 4.14 s, decays via Positron Emission.
    • $^{30}$P: Half-life is 2.498 min, decays via Positron Emission.
    • $^{31}$P: Stable.
    • $^{32}$P: Half-life is 14.268 d, decays via Beta Decay.
    • $^{33}$P: Half-life is 25.34 d, decays via Beta Decay.
    • $^{34}$P: Half-life is 12.43 s, decays via Beta Decay.
    • $^{35}$P: Half-life is 47.3 s, decays via Beta Decay.
    • $^{36}$P: Half-life is 5.9 s, decays via Beta Decay and Neutron Emission.
    • $^{37}$P: Half-life is 2.31 s, decays via Beta Decay and Neutron Emission.
    • $^{38}$P: Half-life is 640 ms, decays via Beta Decay and Neutron Emission.
    • $^{39}$P: Half-life is 280 ms, decays via Beta Decay and Neutron Emission.
    • $^{40}$P: Half-life is 88 ms, decays via Beta Decay and Neutron Emission.
    • $^{41}$P: Half-life is 60 ms, decays via Beta Decay and Neutron Emission.
    • $^{42}$P: Half-life is 48 ms, decays via Beta Decay and Neutron Emission.
    • $^{43}$P: Half-life is 36 ms, decays via Beta Decay and Neutron Emission.
    • $^{44}$P: Half-life is < 120 ns, decays via Beta Decay and Neutron Emission.

Sulfur (S)

  • Atomic Number: 16
  • Symbol: S
  • Isotopes:
    • $^{26}$S: Half-life is 1.8 x 10⁻²¹ s, decays via Proton Emission.
    • $^{27}$S: Half-life is 24 ms, decays via Positron Emission and Proton Emission.
    • $^{28}$S: Half-life is 125 ms, decays via Positron Emission.
    • $^{29}$S: Half-life is 187 ms, decays via Positron Emission.
    • $^{30}$S: Half-life is 1.178 s, decays via Positron Emission.
    • $^{31}$S: Half-life is 2.572 s, decays via Positron Emission.
    • $^{32}$S: Stable.
    • $^{33}$S: Stable.
    • $^{34}$S: Stable.
    • $^{35}$S: Half-life is 87.51 d, decays via Beta Decay.
    • $^{36}$S: Stable.
    • $^{37}$S: Half-life is 5.05 min, decays via Beta Decay.
    • $^{38}$S: Half-life is 2.84 min, decays via Beta Decay.
    • $^{39}$S: Half-life is 11.5 s, decays via Beta Decay and Neutron Emission.
    • $^{40}$S: Half-life is 8.8 s, decays via Beta Decay.
    • $^{41}$S: Half-life is 1.99 s, decays via Beta Decay and Neutron Emission.
    • $^{42}$S: Half-life is 1.01 s, decays via Beta Decay and Neutron Emission.
    • $^{43}$S: Half-life is 260 ms, decays via Beta Decay and Neutron Emission.
    • $^{44}$S: Half-life is 100 ms, decays via Beta Decay and Neutron Emission.
    • $^{45}$S: Half-life is 68 ms, decays via Beta Decay and Neutron Emission.
    • $^{46}$S: Half-life is 18 ms, decays via Beta Decay and Neutron Emission.

Chlorine (Cl)

  • Atomic Number: 17
  • Symbol: Cl
  • Isotopes:
    • $^{28}$Cl: Half-life is > 30 ns, decays via Proton Emission.
    • $^{29}$Cl: Half-life is 2.1 x 10⁻²¹ s, decays via Proton Emission.
    • $^{30}$Cl: Half-life is 2.3 x 10⁻²¹ s, decays via Proton Emission.
    • $^{31}$Cl: Half-life is 150 ms, decays via Positron Emission.
    • $^{32}$Cl: Half-life is 298 ms, decays via Positron Emission.
    • $^{33}$Cl: Half-life is 2.511 s, decays via Positron Emission.
    • $^{34}$Cl: Half-life is 1.526 s, decays via Positron Emission.
    • $^{35}$Cl: Stable.
    • $^{36}$Cl: Half-life is 3.01 x 10⁵ years, decays via Beta Decay and Electron Capture.
    • $^{37}$Cl: Stable.
    • $^{38}$Cl: Half-life is 37.24 min, decays via Beta Decay.
    • $^{39}$Cl: Half-life is 55.6 min, decays via Beta Decay.
    • $^{40}$Cl: Half-life is 1.35 min, decays via Beta Decay.
    • $^{41}$Cl: Half-life is 38.4 s, decays via Beta Decay.
    • $^{42}$Cl: Half-life is 6.8 s, decays via Beta Decay and Neutron Emission.
    • $^{43}$Cl: Half-life is 3.5 s, decays via Beta Decay and Neutron Emission.
    • $^{44}$Cl: Half-life is 560 ms, decays via Beta Decay and Neutron Emission.
    • $^{45}$Cl: Half-life is 400 ms, decays via Beta Decay and Neutron Emission.
    • $^{46}$Cl: Half-life is 230 ms, decays via Beta Decay and Neutron Emission.
    • $^{47}$Cl: Half-life is 100 ms, decays via Beta Decay and Neutron Emission.
    • $^{48}$Cl: Half-life is 60 ms, decays via Beta Decay and Neutron Emission.
    • $^{49}$Cl: Half-life is 40 ms, decays via Beta Decay and Neutron Emission.

Argon (Ar)

  • Atomic Number: 18
  • Symbol: Ar
  • Isotopes:
    • $^{30}$Ar: Half-life is 2.4 x 10⁻²² s, decays via Proton Emission.
    • $^{31}$Ar: Half-life is 15 ms, decays via Positron Emission and Proton Emission.
    • $^{32}$Ar: Half-life is 98 ms, decays via Positron Emission.
    • $^{33}$Ar: Half-life is 173.0 ms, decays via Positron Emission.
    • $^{34}$Ar: Half-life is 844.5 ms, decays via Positron Emission.
    • $^{35}$Ar: Half-life is 1.775 s, decays via Positron Emission.
    • $^{36}$Ar: Stable.
    • $^{37}$Ar: Half-life is 35.04 d, decays via Electron Capture.
    • $^{38}$Ar: Stable.
    • $^{39}$Ar: Half-life is 269 years, decays via Beta Decay.
    • $^{40}$Ar: Stable.
    • $^{41}$Ar: Half-life is 1.82 h, decays via Beta Decay.
    • $^{42}$Ar: Half-life is 32.9 years, decays via Beta Decay.
    • $^{43}$Ar: Half-life is 5.37 min, decays via Beta Decay.
    • $^{44}$Ar: Half-life is 11.87 min, decays via Beta Decay.
    • $^{45}$Ar: Half-life is 21.49 s, decays via Beta Decay and Neutron Emission.
    • $^{46}$Ar: Half-life is 8.4 s, decays via Beta Decay and Neutron Emission.
    • $^{47}$Ar: Half-life is 2.5 s, decays via Beta Decay and Neutron Emission.
    • $^{48}$Ar: Half-life is 430 ms, decays via Beta Decay and Neutron Emission.
    • $^{49}$Ar: Half-life is 230 ms, decays via Beta Decay and Neutron Emission.
    • $^{50}$Ar: Half-life is 100 ms, decays via Beta Decay and Neutron Emission.
    • $^{51}$Ar: Half-life is 60 ms, decays via Beta Decay and Neutron Emission.

Potassium (K)

  • Atomic Number: 19
  • Symbol: K
  • Isotopes:
    • $^{34}$K: Half-life is 1.6 x 10⁻²¹ s, decays via Proton Emission.
    • $^{35}$K: Half-life is 1.83 x 10⁻²⁰ s, decays via Proton Emission and Positron Emission.
    • $^{36}$K: Half-life is 344 ms, decays via Positron Emission.
    • $^{37}$K: Half-life is 1.226 s, decays via Positron Emission.
    • $^{38}$K: Half-life is 7.636 min, decays via Positron Emission.
    • $^{39}$K: Stable.
    • $^{40}$K: Half-life is 1.248 x 10⁹ years, decays via Beta Decay, Electron Capture, and Positron Emission.
    • $^{41}$K: Stable.
    • $^{42}$K: Half-life is 12.36 h, decays via Beta Decay.
    • $^{43}$K: Half-life is 22.3 h, decays via Beta Decay.
    • $^{44}$K: Half-life is 22.13 min, decays via Beta Decay.
    • $^{45}$K: Half-life is 17.3 min, decays via Beta Decay.
    • $^{46}$K: Half-life is 105 s, decays via Beta Decay and Neutron Emission.
    • $^{47}$K: Half-life is 28.5 s, decays via Beta Decay and Neutron Emission.
    • $^{48}$K: Half-life is 6.8 s, decays via Beta Decay and Neutron Emission.
    • $^{49}$K: Half-life is 1.26 s, decays via Beta Decay and Neutron Emission.
    • $^{50}$K: Half-life is 470 ms, decays via Beta Decay and Neutron Emission.
    • $^{51}$K: Half-life is 300 ms, decays via Beta Decay and Neutron Emission.
    • $^{52}$K: Half-life is 110 ms, decays via Beta Decay and Neutron Emission.
    • $^{53}$K: Half-life is 35 ms, decays via Beta Decay and Neutron Emission.
    • $^{54}$K: Half-life is 18 ms, decays via Beta Decay and Neutron Emission.

Calcium (Ca)

  • Atomic Number: 20
  • Symbol: Ca
  • Isotopes:
    • $^{35}$Ca: Half-life is 25.7 ms, decays via Positron Emission and Proton Emission.
    • $^{36}$Ca: Half-life is 102 ms, decays via Positron Emission.
    • $^{37}$Ca: Half-life is 181.1 ms, decays via Positron Emission.
    • $^{38}$Ca: Half-life is 439.6 ms, decays via Positron Emission.
    • $^{39}$Ca: Half-life is 859.6 ms, decays via Positron Emission.
    • $^{40}$Ca: Stable.
    • $^{41}$Ca: Half-life is 1.02 x 10⁵ years, decays via Electron Capture.
    • $^{42}$Ca: Stable.
    • $^{43}$Ca: Stable.
    • $^{44}$Ca: Stable.
    • $^{45}$Ca: Half-life is 162.6 d, decays via Beta Decay.
    • $^{46}$Ca: Stable.
    • $^{47}$Ca: Half-life is 4.536 d, decays via Beta Decay.
    • $^{48}$Ca: Stable.
    • $^{49}$Ca: Half-life is 8.718 min, decays via Beta Decay.
    • $^{50}$Ca: Half-life is 13.9 s, decays via Beta Decay.
    • $^{51}$Ca: Half-life is 10.0 s, decays via Beta Decay and Neutron Emission.
    • $^{52}$Ca: Half-life is 4.6 s, decays via Beta Decay and Neutron Emission.
    • $^{53}$Ca: Half-life is 1.1 s, decays via Beta Decay and Neutron Emission.
    • $^{54}$Ca: Half-life is 600 ms, decays via Beta Decay and Neutron Emission.
    • $^{55}$Ca: Half-life is 180 ms, decays via Beta Decay and Neutron Emission.
    • $^{56}$Ca: Half-life is 100 ms, decays via Beta Decay and Neutron Emission.
    • $^{57}$Ca: Half-life is 40 ms, decays via Beta Decay and Neutron Emission.
    • $^{58}$Ca: Half-life is 30 ms, decays via Beta Decay and Neutron Emission.
    • $^{59}$Ca: Half-life is 20 ms, decays via Beta Decay and Neutron Emission.
    • $^{60}$Ca: Half-life is < 160 ns, decays via Beta Decay and Neutron Emission.