Nuklida · radioaktif
Arsen-76 (⁷⁶As)
Arsen-76 (⁷⁶As) adalah isotop radioaktif arsen dengan 33 proton dan 43 neutron (nomor massa 76). Waktu paruhnya 1,0933 hari (± 0,0038 hari), meluruh terutama lewat peluruhan beta minus (β⁻).
Data nuklida
- Unsur
- Arsen (As, Z = 33)
- Nomor massa (A)
- 76
- Proton (Z)
- 33
- Neutron (N)
- 43
- Massa atom
- 75.922392011 ± 0.000000951 u
- Waktu paruh
- 1,0933 hari (± 0,0038 hari)
- Mode peluruhan
- Peluruhan beta minus (β⁻) ( 100 %)
- Inti anak
- Selenium-76 (⁷⁶Se)
- Tahun penemuan
- 1934
- Sumber data
- IAEA Atomic Mass Data Center (NUBASE) and IUPAC CIAAW, via PubChem
Kegunaan isotop arsen
- 73As and 76As (with half-lives of 80.3 days and 1.1 days, respectively) are important radioactive tracers used in environmental and biomedical studies to quantify arsenic uptake. 74As (with a half-life of 17.8 days) has been used to investigate the biotransformation (modification of a chemical compound by an organism) of arsenate by mammals. In one study rabbits were injected with 74As-labeled arsenate. After a given amount of time, blood and blood products were sampled and tested for the presence and quantity of labeled arsenate metabolites. Inhalation of dust or smoke containing 74As is thought to be a causal agent of lung cancer. In one study, the “absorption rate from the bronchial tree (a respiratory tract, which conducts air into the lungs) was rapid for the first several days and then tapered off slowly. In three patients an average of 45 percent of the inhaled arsenic was eliminated in the urine in 10 days and about 0.5 percent in the stools. The remainder must be assumed to have been deposited in the body, exhaled, and/or eliminated in body secretions and excreta over a long period of time.” See Fig. IUPAC.33.1.
Isotop arsen lainnya
⁶⁰As, ⁶¹As, ⁶²As, ⁶³As, ⁶⁴As, ⁶⁵As, ⁶⁶As, ⁶⁷As, ⁶⁸As, ⁶⁹As, ⁷⁰As, ⁷¹As, ⁷²As, ⁷³As, ⁷⁴As, ⁷⁵As, ⁷⁷As, ⁷⁸As, ⁷⁹As, ⁸⁰As, ⁸¹As, ⁸²As, ⁸³As, ⁸⁴As, ⁸⁵As, ⁸⁶As, ⁸⁷As, ⁸⁸As, ⁸⁹As, ⁹⁰As, ⁹¹As, ⁹²As