Question

write the Valencies of 2nd period of elements​

Answer 1

Answer:

the second period contain the element lithium , beryllium ,boron ,carbon ,nitrogen ,Oxygen ,fluorine and neon. in a quantum mechanical description of atomic structure , this period corresponds to the filling of the second ( n=2) shell, more specifically it's 2s and 2p subshells.

Answer 2

The valencies of 2nd period of elements​ are:

Elements- Valency

1. Lithium- 1

2. Beryllium- 2

3. Boron- 3

4. Carbon-4

5. Nitrogen-3

6. Oxygen- 2

7. Fluorine-1

8. Neon- 0

• The valence electrons refer to the number of electrons present in the outermost shell of an atom.

• This determines the valency of an atom.

• The valency of the elements that belong to the s-block and p-block of the periodic table is determined by noting the number of valence electrons present and subtracting the valence electrons from 8.

S-block- Lithium, Beryllium

P-block- Boron, Carbon, Nitrogen, Oxygen, Fluorine, Neon.