【】How Many Valence Electrons Does Calcium(Ca) Have?||number of valence electrons in calcium

How Many Valence Electrons Does Calcium(Ca) Have?

Answer:

Calcium has two valence electrons.

Explanation:

Now I am going to show you how many  valence electrons  calcium have in just 5 steps.

             Step-1:

First, find the atomic number of calcium from periodic table.

From periodic table ,we see that the atomic number of calcium is 20.

                 Step-2:

We know that the atomic number of calcium is 20.So calcium has 20 protons and 20 electrons as the charge of electrons and protons are equal but opposite in nature.The charge of proton is +1 and the charge of electron is -1.

                Step-3:

Now write the electron configuration of calcium .

Ca(20)=1s²2s²2p⁶3s²3p⁶4s²

                Step-4:

Ca(20)=1s²2s²2p⁶3s²3p⁶4s²

Now we will find out valence shell of calcium from the electronic configuration of  calcium.

Ca(20)=1s²2s²2p⁶3s²3p⁶4s²

Valence shell can be found from the highest number of principal quantum number.

You know that principal quantum number is expressed by n.

Ca(20)=1s²2s²2p⁶3s²3p⁶4s²

Here the highest value of n is 4.SoThe valence shell of calcium is 4s²

                 Step-5

In this step,we will find out the valence electrons of calcium.

We have to know that the electrons of valence shell are called valence electrons.

Ca(20)=1s²2s²2p⁶3s²3p⁶4s²

From the above electron 

configuration 

of calcium,we see 

that calcium has 2 

valence electrons in its 

valence shell(4s²).

So there are two valence electrons of calcium.

     continue