˹á arrow R
˹áԧʹԴ
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ѤҪԡ
Ѻ͡!

ʶԵԼ
: 1578858 
й 6 ؤŷ ͹Ź
R
ͧ
Radiation 733
Radiation 527
Radioactive 569
Radioactive Decay 750
Radioactivity 615
Radium 897
Radon 669
Rare Earth Metals 601
Rate Constant 800
Rate Law 897
Rate Reaction 624
Reactants 635
Redox Reaction 957
Reducing Reagent 598
Representative Element 867
Resonance 705
Resonance Hybrid 673
Resonance Structure 949
Reverse Reaction 619
Reversible Reaction 715
Rhenium 598
Rhodium 731
Round bottomed flask:ⷡ鹡 863
Rubidium 682
Ruthenium 653
Rutherfordium 712