Ampitahao ireo singantaharo
Safidio ny singantaharo 4 farafahakeliny mba hampitaha ny toetoetr'izy ireo mifampitohy.
Ra
Radium
#88 · Metaly
| Mass | 226.02541 u |
| Fiparitahan'ny loko | 5.5 g/cm³ |
| Mikoriana | 973.0 K |
| Mameno | 2010.0 K |
| Electronegativity | 0.9 |
| Arika | 509.3 kJ/mol |
| Atomic radius | 221.0 pm |
| Block | s-block |
| Fanjakana (RT) | Mitambatra |
| Fandrindrana | [Rn] 7s2 |