˹á arrow R
˹áԧʹԴ
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ѤҪԡ
Ѻ͡!

ʶԵԼ
: 1260980 
й 6 ؤŷ ͹Ź
R
ͧ
Radiation 551
Radiation 358
Radioactive 410
Radioactive Decay 527
Radioactivity 411
Radium 720
Radon 474
Rare Earth Metals 407
Rate Constant 571
Rate Law 695
Rate Reaction 476
Reactants 461
Redox Reaction 788
Reducing Reagent 422
Representative Element 631
Resonance 569
Resonance Hybrid 445
Resonance Structure 784
Reverse Reaction 449
Reversible Reaction 571
Rhenium 388
Rhodium 581
Round bottomed flask:ⷡ鹡 668
Rubidium 509
Ruthenium 464
Rutherfordium 494