Question

1 to 20 elements electronic configuration and radicals and two compounds

Answer 1

Answer:

hydrogen to calcium

Explanation:

hydrogen=1,helium=2, lithium=2, 1,beryllium=2, 2,boron=2, 3,carbon=2, 4,nitrogen=2, 5,oxygen=2, 6,fluorine=2, 7,neon=2, 8,sodium=2, 8,1,magnesium=2, 8,2,alluminium=2, 8,3,silicon=2, 8,4,phosphorus=2, 8,5,sulpher=2, 8,6,chlorine=2, 8,7,argon=2, 8,8,potassium=2, 8,8,1,calcium=2,8,8,2.