˹á arrow R
˹áԧʹԴ
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ѤҪԡ
Ѻ͡!

ʶԵԼ
: 2124804 
й 21 ؤŷ ͹Ź
R
ͧ
Radiation 1162
Radiation 671
Radioactive 661
Radioactive Decay 838
Radioactivity 703
Radium 1344
Radon 848
Rare Earth Metals 590
Rate Constant 1155
Rate Law 1379
Rate Reaction 736
Reactants 768
Redox Reaction 1163
Reducing Reagent 1024
Representative Element 1394
Resonance 1035
Resonance Hybrid 1229
Resonance Structure 1290
Reverse Reaction 690
Reversible Reaction 1091
Rhenium 731
Rhodium 1313
Round bottomed flask:ⷡ鹡 1559
Rubidium 951
Ruthenium 1012
Rutherfordium 872