Example: confidence
Berylliu M
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11 0620 43 3RP - GCE Guide
papers.gceguide.com4 Be berylliu m 9 Ke atomic number atomic symbol y name relative atomic mas s 11 Na sodium 23 12 Mg magnesium 24 19 K potassium 39 20 Ca calciu m 40 37 Rb rubidium 85 38 Sr strontiu m 88 55 Cs caesiu m 133 56 Ba barium 137 ... m 11 6 Lv livermorium ...
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papers.gceguide.com4 Be berylliu m 9 Ke atomic number atomic symbol y name relative atomic mas s 11 Na sodium 23 12 Mg magnesium 24 19 K potassium 39 20 Ca calciu m 40 37 Rb rubidium 85 38 Sr strontiu 88 55 Cs caesiu m 133 56 Ba bariu 137 87 Fr franciu m ...