˹á arrow R
˹áԧʹԴ
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ѤҪԡ
Ѻ͡!

ʶԵԼ
: 1430723 
й 25 ؤŷ ͹Ź
R
ͧ
Radiation 664
Radiation 491
Radioactive 526
Radioactive Decay 709
Radioactivity 581
Radium 849
Radon 628
Rare Earth Metals 564
Rate Constant 746
Rate Law 857
Rate Reaction 594
Reactants 596
Redox Reaction 921
Reducing Reagent 549
Representative Element 782
Resonance 668
Resonance Hybrid 577
Resonance Structure 892
Reverse Reaction 570
Reversible Reaction 665
Rhenium 558
Rhodium 677
Round bottomed flask:ⷡ鹡 803
Rubidium 646
Ruthenium 597
Rutherfordium 661