H 1s1

He 1s2

Li 1s22s1

Be 1s22s2

B 1s22s22p1

C 1s22s22p2

N 1s22s22p3

O 1s22s22p4

F 1s22s22p5

Ne 1s22s22p6

Na 1s22s22p63s1

Mg 1s22s22p63s2

Al 1s22s22p63s23p1

Si 1s22s22p63s23p2

P 1s22s22p63s23p3

S 1s22s22p63s23p4

Cl 1s22s22p63s23p5

Ar 1s22s22p63s23p6

K 1s22s22p63s23p64s1

Ca 1s22s22p63s23p64s2

Sc 1s22s22p63s23p63d14s2

Ti 1s22s22p63s23p63d24s2

V 1s22s22p63s23p63d34s2

Cr 1s22s22p63s23p63d54s1

Mn 1s22s22p63s23p63d54s2

Fe 1s22s22p63s23p63d64s2

Co 1s22s22p63s23p63d74s2

Ni 1s22s22p63s23p63d84s2

Cu 1s22s22p63s23p63d104s1

Zn 1s22s22p63s23p63d104s2

Ga 1s22s22p63s23p63d104s24p1

Ge 1s22s22p63s23p63d104s24p2

As 1s22s22p63s23p63d104s24p3

Se 1s22s22p63s23p63d104s24p4

Br 1s22s22p63s23p63d104s24p5

Kr 1s22s22p63s23p63d104s24p6

Rb 1s22s22p63s23p63d104s24p65s1

Sr 1s22s22p63s23p63d104s24p65s2

Y 1s22s22p63s23p63d104s24p64d15s2

Zr 1s22s22p63s23p63d104s24p64d25s2

其實只需要記最外層電子就行 然後加上上一週期稀有氣體的電子層排布