˹á arrow R
˹áԧʹԴ
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ѤҪԡ
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ʶԵԼ
: 2341591 
й 4 ؤŷ ͹Ź
R
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Radiation 1246
Radiation 735
Radioactive 730
Radioactive Decay 904
Radioactivity 758
Radium 1418
Radon 940
Rare Earth Metals 647
Rate Constant 1217
Rate Law 1450
Rate Reaction 797
Reactants 825
Redox Reaction 1235
Reducing Reagent 1144
Representative Element 1535
Resonance 1102
Resonance Hybrid 1627
Resonance Structure 1456
Reverse Reaction 770
Reversible Reaction 1247
Rhenium 796
Rhodium 1398
Round bottomed flask:ⷡ鹡 1782
Rubidium 1013
Ruthenium 1093
Rutherfordium 992