Respuesta :

lilian76

Answer:

1s2 2s1

Explanation:

that's the modern electronic configuration of lithium

Maru2020

Answer:

Lithium (Li): 1sA2sB

A = 2

B = 1

Beryllium (Be): 1sC2sD

C = 2

D = 2

Boron (B): 1sE2sF2pG

E = 2

F = 2

G = 1

Carbon (C): 1sH2sI2pJ

H = 2

I = 2

J = 2

Explanation: I might as well give all the answers. Hope this helps!