˹á arrow R
˹áԧʹԴ
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ѤҪԡ
Ѻ͡!

ʶԵԼ
: 2388030 
й 4 ؤŷ ͹Ź
R
ͧ
Radiation 1277
Radiation 754
Radioactive 750
Radioactive Decay 924
Radioactivity 773
Radium 1445
Radon 966
Rare Earth Metals 663
Rate Constant 1234
Rate Law 1472
Rate Reaction 817
Reactants 847
Redox Reaction 1258
Reducing Reagent 1211
Representative Element 1579
Resonance 1134
Resonance Hybrid 1749
Resonance Structure 1504
Reverse Reaction 789
Reversible Reaction 1318
Rhenium 816
Rhodium 1428
Round bottomed flask:ⷡ鹡 1833
Rubidium 1036
Ruthenium 1117
Rutherfordium 1015