˹á arrow R
˹áԧʹԴ
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ѤҪԡ
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ʶԵԼ
: 2494193 
й 7 ؤŷ ͹Ź
R
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Radiation 1358
Radiation 826
Radioactive 853
Radioactive Decay 1003
Radioactivity 853
Radium 1549
Radon 1049
Rare Earth Metals 735
Rate Constant 1317
Rate Law 1587
Rate Reaction 905
Reactants 919
Redox Reaction 1326
Reducing Reagent 1267
Representative Element 1636
Resonance 1201
Resonance Hybrid 1862
Resonance Structure 1558
Reverse Reaction 874
Reversible Reaction 1394
Rhenium 889
Rhodium 1521
Round bottomed flask:ⷡ鹡 1921
Rubidium 1107
Ruthenium 1218
Rutherfordium 1111