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Seřazení prvků podle hmotnosti
Seřaď tyto prvky od nejlehčího po nejtěžší: \( Ca, At, Am, Ti, He, Hg, Po, N \).
\( \textrm {He},\textrm {Ca},\textrm {N},\textrm {Ti},\textrm {Po},\textrm {Hg},\textrm {At},\textrm {Am} \)
\( \textrm {He},\textrm {N},\textrm {Ca},\textrm {Ti},\textrm {Hg},\textrm {Am},\textrm {Po},\textrm {At} \)
\( \textrm {N},\textrm {He},\textrm {Ca},\textrm {Ti},\textrm {Hg},\textrm {At},\textrm {Po},\textrm {Am} \)
\( \textrm {He},\textrm N,\textrm {Ca},\textrm {Ti},\textrm {Hg},\textrm {Po},\textrm {At},\textrm {Am} \)