Why is K lighter than Na even though having more atomic mass than it ?
Asked by sashank2
| 31st Jan, 2010,
08:20: AM
Expert Answer:
Density (mass/volume) of K is less than that of Na. As we move down the group atomic size increases and mass also increases. But in case of K increase in atomic size compensates more than increase in mass. Hence K is lighter than Na
Answered by
| 1st Feb, 2010,
09:51: AM
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