˹á arrow R
˹áԧʹԴ
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ѤҪԡ
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ʶԵԼ
: 2217657 
й 20 ؤŷ ͹Ź
R
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Radiation 1193
Radiation 697
Radioactive 691
Radioactive Decay 870
Radioactivity 727
Radium 1372
Radon 886
Rare Earth Metals 614
Rate Constant 1186
Rate Law 1407
Rate Reaction 761
Reactants 785
Redox Reaction 1197
Reducing Reagent 1080
Representative Element 1468
Resonance 1064
Resonance Hybrid 1443
Resonance Structure 1355
Reverse Reaction 731
Reversible Reaction 1164
Rhenium 762
Rhodium 1356
Round bottomed flask:ⷡ鹡 1662
Rubidium 991
Ruthenium 1047
Rutherfordium 925