˹á arrow R
˹áԧʹԴ
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ѤҪԡ
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ʶԵԼ
: 2241211 
й 17 ؤŷ ͹Ź
R
ͧ
Radiation 1196
Radiation 701
Radioactive 692
Radioactive Decay 878
Radioactivity 732
Radium 1380
Radon 890
Rare Earth Metals 617
Rate Constant 1188
Rate Law 1409
Rate Reaction 764
Reactants 788
Redox Reaction 1200
Reducing Reagent 1089
Representative Element 1479
Resonance 1066
Resonance Hybrid 1469
Resonance Structure 1366
Reverse Reaction 736
Reversible Reaction 1175
Rhenium 765
Rhodium 1360
Round bottomed flask:ⷡ鹡 1687
Rubidium 994
Ruthenium 1051
Rutherfordium 931