| is rb an alkali metal | 0.74 | 0.5 | 833 | 21 | 63 |
| reactive soft alkali metal symbol rb | 1.76 | 1 | 305 | 36 | 84 |
| is rb a metal or nonmetal | 1.16 | 0.8 | 1168 | 25 | 7 |
| is rb a nonmetal | 0.61 | 0.9 | 6488 | 16 | 23 |
| is rb a metal nonmetal or metalloid | 1.26 | 1 | 8295 | 35 | 97 |
| rb element metal or nonmetal | 1.42 | 0.4 | 8577 | 28 | 100 |
| is pb an alkali metal | 0.25 | 0.6 | 4851 | 21 | 1 |
| is br an alkali metal | 0.16 | 0.8 | 6859 | 21 | 98 |
| is rb2s metal or nonmetal | 1.49 | 0.6 | 7724 | 25 | 43 |
| is rb an element | 1.84 | 0.6 | 938 | 16 | 3 |
| which is an alkali metal | 0.03 | 0.3 | 2491 | 24 | 53 |
| is rubidium an alkali metal | 0.49 | 0.8 | 5057 | 27 | 61 |
| what element is rb | 1.63 | 0.5 | 6724 | 18 | 17 |
| what is rb in the periodic table | 0.63 | 0.8 | 1869 | 32 | 8 |
| what is rb in chemistry | 0.04 | 1 | 1783 | 23 | 82 |
| what does rb mean in steel | 0.19 | 0.1 | 2074 | 26 | 30 |
