Jawabanmu

2014-09-08T18:26:42+07:00
1. Na = natrium
2. He = helium
3. Ca = kalsium
4. B = boron
5. Ra = radium
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2014-09-08T18:47:04+07:00
1. Oksigen =O
2. Nitrogen =N
3. Magnesium= Mg
4. Hidrogen= H
5.Helium= He
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