Sagot :
Answer:
Element Atomic
number Electron configuration
hydrogen 1 1s1
helium 2 1s2
lithium 3 1s22s1
beryllium 4 1s22s2
boron 5 1s22s22p1
carbon 6 1s22s22p2
nitrogen 7 1s22s22p3
oxygen 8 1s22s22p4
fluorine 9 1s22s22p5
neon 10 1s22s22p6
sodium 11 1s22s22p63s1
magnesium 12 1s22s22p63s2
aluminum 13 1s22s22p63s23p1
silicon 14 1s22s22p63s23p2
phosphorus 15 1s22s22p63s23p3
sulfur 16 1s22s22p63s23p4
chlorine 17 1s22s22p63s23p5
argon 18 1s22s22p63s23
Explanation:
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