˹á arrow R
˹áԧʹԴ
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ѤҪԡ
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ʶԵԼ
: 2196928 
й 4 ؤŷ ͹Ź
R
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Radiation 1187
Radiation 690
Radioactive 684
Radioactive Decay 865
Radioactivity 722
Radium 1364
Radon 879
Rare Earth Metals 609
Rate Constant 1174
Rate Law 1400
Rate Reaction 754
Reactants 782
Redox Reaction 1188
Reducing Reagent 1069
Representative Element 1446
Resonance 1056
Resonance Hybrid 1381
Resonance Structure 1340
Reverse Reaction 724
Reversible Reaction 1144
Rhenium 756
Rhodium 1347
Round bottomed flask:ⷡ鹡 1643
Rubidium 982
Ruthenium 1038
Rutherfordium 909