Cas relatif 0, jisim relatif 1 Relative charge 0, relative mass 1 Cas relatif -1, jisim relatif 1/1840 Relative charge +1, relative mass 1 Cas relatif +1, jisim relatif 0 Relative charge -1, relative mass 1/1840 Cas relatif +1, jisim relatif 1 Relative charge +1, relative mass 0

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