˹á arrow R
˹áԧʹԴ
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ѤҪԡ
Ѻ͡!

ʶԵԼ
: 2546115 
й 2 ؤŷ ͹Ź
R
ͧ
Radiation 1388
Radiation 853
Radioactive 886
Radioactive Decay 1035
Radioactivity 880
Radium 1588
Radon 1080
Rare Earth Metals 761
Rate Constant 1347
Rate Law 1615
Rate Reaction 932
Reactants 942
Redox Reaction 1354
Reducing Reagent 1304
Representative Element 1666
Resonance 1232
Resonance Hybrid 1889
Resonance Structure 1584
Reverse Reaction 901
Reversible Reaction 1431
Rhenium 919
Rhodium 1558
Round bottomed flask:ⷡ鹡 1948
Rubidium 1135
Ruthenium 1261
Rutherfordium 1153