Question

the subshell electronic configuration of an atom is 1s2 2s2 2p6 3s2 3p4
a, how many shells are present in this atom?
b, what is the total number of electrons in this atom?
c, what is its atomic number?
d, how can the sub shell electronic configuration be written in short form? ​

Answer 1

Answer:

the answer is

Explanation:

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