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Answer to Question #15074 in Inorganic Chemistry for server 12

Question #15074
Q: Periodic table helps in predicting arrangement of electrons in an atom, yes or not?explain with examples.
Expert's answer
Yes. Number of Element (11 for Na, 1 for H and other....) means how many electrons in an
atom. You can use some hints, sometimes it can be included in periodic table and
looks like this 1s22s22p63s23p64s1 it is for K and means that 2 electrons is in first S-level and 2 electrons on second S-level, 6 electrons on second P-level, 2 electrons in
third S-level, the same with other levels.

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