˹á arrow R
˹áԧʹԴ
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ѤҪԡ
Ѻ͡!

ʶԵԼ
: 2150328 
й 20 ؤŷ ͹Ź
R
ͧ
Radiation 1170
Radiation 685
Radioactive 666
Radioactive Decay 842
Radioactivity 714
Radium 1346
Radon 857
Rare Earth Metals 600
Rate Constant 1162
Rate Law 1382
Rate Reaction 744
Reactants 769
Redox Reaction 1165
Reducing Reagent 1039
Representative Element 1418
Resonance 1050
Resonance Hybrid 1250
Resonance Structure 1312
Reverse Reaction 704
Reversible Reaction 1123
Rhenium 746
Rhodium 1328
Round bottomed flask:ⷡ鹡 1593
Rubidium 966
Ruthenium 1021
Rutherfordium 889