1H1.0083Li6.9411Na22.9919K39.137Rb85.4755Cs132.987Fr223
4Be9.01212Mg24.3120Ca40.0838Sr87.6256Ba137.388Ra226
21Sc44.9639Y88.91
57La138.989Ac227
22Ti47.8740Zr91.2272Hf178.5104Rf267
58Ce140.190Th232
23V50.9441Nb92.9173Ta180.9105Db268
59Pr140.991Pa231
24Cr5242Mo95.9574W183.8106Sg271
60Nd144.292U238
25Mn54.9443Tc97.9175Re186.2107Bh274
61Pm144.993Np237
26Fe55.8544Ru101.176Os190.2108Hs269
62Sm150.494Pu244
27Co58.9345Rh102.977Ir192.2109Mt276
63Eu15295Am243
28Ni58.6946Pd106.478Pt195.1110Ds281
64Gd157.396Cm247
29Cu63.5547Ag107.979Au197111Rg281
65Tb158.997Bk247
30Zn65.3848Cd112.480Hg200.6112Cn285
66Dy162.598Cf251
5B10.8113Al26.9831Ga69.7249In114.881Tl204.4113Nh286
67Ho164.999Es252
6C12.0114Si28.0932Ge72.6350Sn118.782Pb207.2114Fl289
68Er167.3100Fm257
7N14.0115P30.9733As74.9251Sb121.883Bi209115Mc288
69Tm168.9101Md258
8O1616S32.0634Se78.9752Te127.684Po209116Lv293
70Yb173102No259
9F1917Cl35.4535Br79.953I126.985At210117Ts294
71Lu175103Lr262
2He4.00310Ne20.1818Ar39.9536Kr83.854Xe131.386Rn222118Og294
Actinium
Ac
Rn 7s2 6d1
1047°C
3197°C
Silvery radioactive metallic element, belongs to group 3 of the periodic table. The most stable isotope, ²²⁷Ac, has a half-life of 217 years. ²²⁸Ac (half-life of 6.13 hours) also occurs in nature. There are 22 other artificial isotopes, all radioactive and having very short half-lives. Chemistry similar to lanthanumpy. Used as a source of alpha particles. Discovered by A. Debierne in 1899.
186pm
153pm
140pm
100101102103104105106log(kJ mol⁻¹)
0, +3
It has no significant commercial applications.
33.77kJ mol⁻¹
1.1PAULING
22.54cm³ mol⁻¹
188pm
247pm
Extremely rare, found in all Uranium ores. Usually obtained by treating Radium with neutrons in a reactor.
Discovered in 1899 by André Debierne in France
Greek: akis, aktinos (ray).
7440-34-8
5.50x10⁻¹⁰mg kg⁻¹
292.9kJ mol⁻¹
10.5kJ mol⁻¹
406kJ mol⁻¹
IsotopeAbundanceHalf Life
225Ac-9.92d
227Ac-21.77a

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https://github.com/reubn/tabla


Using data from mendeleev.
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