Question

Ongoing through the modern periodic table it is seen that the elements

Li, Be, B, C, N, O, F

and

Ne

belong to period-

2

. Write down the electronic configuration of all of them.

Accepted Answer

The electronic configuration refers to the arrangement of the electrons in the different orbitals of an atom.

i) Li- The atomic number of lithium- $3$ and the electronic configuration is- $2, 1$
ii) Be- The atomic number of beryllium- $4$ and the electronic configuration is- $2, 2$
iii) B- The atomic number of boron- $5$ and the electronic configuration is- $2, 3$
iv) C- The atomic number of carbon- $6$ and the electronic configuration is- $2, 4$ .

v) N- The atomic number of nitrogen- $7$ and the electronic configuration is- $2, 5$
vi) O- The atomic number of oxygen- $8$ and the electronic configuration is- $2, 6$
vii) F- The atomic number of fluorine- $9$ and the electronic configuration is- $2, 7$
viii) Ne- The atomic number of neon- $10$ and the electronic configuration is- $2, 8$ .

Maharashtra Board Solutions for Chapter: Periodic Classification of Elements, Exercise 7: Can you tell?

Maharashtra Board Science and Technology Solutions for Exercise - Maharashtra Board Solutions for Chapter: Periodic Classification of Elements, Exercise 7: Can you tell?

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