Tuesday, October 12, 2021

Periodic Classification of Elements | Class 10 | Activity 5.5 with Solution

Periodic Classification of Elements | Activities in Text Book with Solution

Activity 5.5

If you look at the Modern Periodic Table (5.6), you will find that the elements Li, Be, B, C, N, O, F, and Ne are present in the second period. Write down their electronic configurations.

✅ Answer: 

Li: 2,1
Be: 2, 2
B: 2, 3
C: 2, 4
N: 2, 5
O: 2, 6
F: 2, 7
Ne: 2, 8

Do these elements also contain the same number of valence electrons?

✅ Answer: No.

Do they contain the same number of shells?

✅ Answer: Yes.

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