ɹˈeɪdiəm, lˈaɪk ɹˈeɪdɑːn, ɪz ɹˌeɪdɪoʊˈæktɪv ænd ɪz fˈaʊnd ɪn smˈɔːl kwˈɔntᵻɾiz ɪn nˈeɪtʃɚ ænd ɪz hˈæzɚdəs tə lˈaɪf ɪf ɹˌeɪdɪˈeɪʃən ɛksˈiːdz twˈɛnti dˈæʃ fˈɪfti ˈɛm ˌɛsvˈiː slˈæʃ jˈɪɹ.
Radium, like radon, is radioactive and is found in small quantities in nature and is hazardous to life if radiation exceeds 20-50 mSv/year.