Answer
397.2k+ views
Hint: To find the number of electrons in $B{{r}^{-}}$, you should first know that how many electrons are present in bromine and then, add one electron in it and then, those resultant number of electrons will be present in $B{{r}^{-}}$. Now you can easily answer the statement.
Complete Solution :
- Bromine is a gas which comes under the category of halogens and belongs to the p-block elements of the periodic table.
- It lies in the 17th group and 4th period of the periodic table.
- It has an atomic number as 35 and the mass number as 80. It has the electronic configuration as: $3{{d}^{10}}4{{s}^{2}}4{{p}^{5}}$.
- Bromine has seven electrons in its outermost valence shell and has a strong tendency to gain one electron to acquire the fully filled electronic configuration of the nearest noble gas i.e. krypton.
Now considering the statement as:
- The number of electrons present in an atom is always equal to the atomic number of that very element.
- So, therefore, the number of electrons present in bromine = $35$.
Since, $B{{r}^{-}}$ carries negative charge i.e. it means it has gained one electron to complete its octet.
Thus, the total number of electrons present in $B{{r}^{-}}$ = $35 + 1 = 36$.
Note: Bromine being a halogen has seven electrons in its outermost shell and requires only one electron to complete its octet. So, bromine has a strong tendency to gain one electron from the other electron donating species and thus, it acts as a strong Lewis acid.
Complete Solution :
- Bromine is a gas which comes under the category of halogens and belongs to the p-block elements of the periodic table.
- It lies in the 17th group and 4th period of the periodic table.
- It has an atomic number as 35 and the mass number as 80. It has the electronic configuration as: $3{{d}^{10}}4{{s}^{2}}4{{p}^{5}}$.
- Bromine has seven electrons in its outermost valence shell and has a strong tendency to gain one electron to acquire the fully filled electronic configuration of the nearest noble gas i.e. krypton.
Now considering the statement as:
- The number of electrons present in an atom is always equal to the atomic number of that very element.
- So, therefore, the number of electrons present in bromine = $35$.
Since, $B{{r}^{-}}$ carries negative charge i.e. it means it has gained one electron to complete its octet.
Thus, the total number of electrons present in $B{{r}^{-}}$ = $35 + 1 = 36$.
Note: Bromine being a halogen has seven electrons in its outermost shell and requires only one electron to complete its octet. So, bromine has a strong tendency to gain one electron from the other electron donating species and thus, it acts as a strong Lewis acid.
Recently Updated Pages
How many sigma and pi bonds are present in HCequiv class 11 chemistry CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Why Are Noble Gases NonReactive class 11 chemistry CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Let X and Y be the sets of all positive divisors of class 11 maths CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Let x and y be 2 real numbers which satisfy the equations class 11 maths CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Let x 4log 2sqrt 9k 1 + 7 and y dfrac132log 2sqrt5 class 11 maths CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Let x22ax+b20 and x22bx+a20 be two equations Then the class 11 maths CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Trending doubts
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
At which age domestication of animals started A Neolithic class 11 social science CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Which are the Top 10 Largest Countries of the World?
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Give 10 examples for herbs , shrubs , climbers , creepers
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Difference Between Plant Cell and Animal Cell
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Write a letter to the principal requesting him to grant class 10 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Change the following sentences into negative and interrogative class 10 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Fill in the blanks A 1 lakh ten thousand B 1 million class 9 maths CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)