˹á arrow R
˹áԧʹԴ
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ѤҪԡ
Ѻ͡!

ʶԵԼ
: 2471374 
й 6 ؤŷ ͹Ź
R
ͧ
Radiation 1336
Radiation 821
Radioactive 839
Radioactive Decay 998
Radioactivity 841
Radium 1532
Radon 1035
Rare Earth Metals 723
Rate Constant 1303
Rate Law 1550
Rate Reaction 890
Reactants 910
Redox Reaction 1315
Reducing Reagent 1252
Representative Element 1622
Resonance 1185
Resonance Hybrid 1842
Resonance Structure 1540
Reverse Reaction 860
Reversible Reaction 1361
Rhenium 879
Rhodium 1498
Round bottomed flask:ⷡ鹡 1902
Rubidium 1098
Ruthenium 1227
Rutherfordium 1098