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Unsur kimia Radium didistribusikan dalam proporsi kecil di batuan dan tanah, produk dekomposisi radioaktif Uranium dan Thorium. Ia bergerak melalui udara dan air, kemudian bersentuhan dengan tumbuhan dan hewan, sehingga manusia terpapar logam ini. Ciri-cirinya antara lain radioaktivitasnya yang tinggi, terbagi menjadi 13 isotop. Pelajari lebih lanjut tentang unsur ini, asal usulnya, cara memperolehnya, dan ... Baca selengkapnya