˹á arrow R
˹áԧʹԴ
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ѤҪԡ
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ʶԵԼ
: 1281236 
й 8 ؤŷ ͹Ź
R
ͧ
Radiation 581
Radiation 365
Radioactive 419
Radioactive Decay 535
Radioactivity 419
Radium 727
Radon 482
Rare Earth Metals 415
Rate Constant 584
Rate Law 706
Rate Reaction 485
Reactants 468
Redox Reaction 796
Reducing Reagent 430
Representative Element 649
Resonance 580
Resonance Hybrid 466
Resonance Structure 793
Reverse Reaction 459
Reversible Reaction 595
Rhenium 395
Rhodium 591
Round bottomed flask:ⷡ鹡 687
Rubidium 517
Ruthenium 474
Rutherfordium 503