23 January, 14:54
What element has 3 electrons in the 2p sublevel?
23 January, 15:35
Aufbau says that the sublevels fill 1s2, 2s2, 2p6. That would mean that you must have filled 1 and 2 s (=4) and 3 more.
Last I checked, 3 + 4 = 7. Which element has 7 electrons?
I'll give you a hint: its atomic number is 7. Another hint: its symbol is N.
23 January, 16:19
The element should be nitrogen
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