Question

write the electric confugration of atomic no 1 （hydrogen）to atomic no 20 （calcium）​

Answer 1

Answer:

K L M N

hydrogen - 1

helium 2

lithium 2 1

beryllium. 2 2

boron 2. 3

carbon 2. 4

nitrogen 2. 5

oxygen. 2. 6

flourine. 2. 7

neon. 2. 8

sodium. 2. 8. 1

magnesium. 2. 8. 2

aluminum. 2. 8. 3

silicon 2. 8. 4

phosphorus 2. 8. 5

sulphur. 2. 8. 6

chlorine. 2. 8. 7

argon 2. 8. 8

potassium. 2. 8. 8. 1

calcium. 2. 8. 8. 2

Answer 2

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