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Subject: Chemistry, asked on 1/1/18

What are the Memonics of periodic table? Answer the Memonics of P-block of the periodic table. DON'T SEND THE SIMILAR QUERIES.

 

Subject: Chemistry, asked on 2/4/19

Why the elements of the Boron Family are called Icosagens?

Subject: Chemistry, asked on 30/9/19

why are halogens known as salt formers?

Subject: Chemistry, asked on 1/2/18



Q. Sodium and aluminium have atomic numbers 11 and 13 respectively. They are separated by one element in the periodic table, and have valencies 1 and 3 respectively. Chlorine and potassium are also separated by one element in the periodic table (their atomic numbers being 17 and 19 respectively) and yet both have valency 1. Explain.

Q. Helium is an unreactive gas and neon is a gas of extremely low reactivity. What, if anything, do their atoms have in common.

Q. In which part of a group would you separately expect the elements to have:
a) the greatest metallic character?
b) the largest atomic size?

Q. What happens to number of valence electrons in atoms of elements as we go down a group of the periodic table?

Subject: Chemistry, asked on 18/1/18

Give reason why carbon and silicon shows +4 Oxidation State while Ge, Sn and Pb shows +2 ?

Subject: Chemistry, asked on 16/2/18

What is aromaticity

Subject: Chemistry, asked on 3/7/19

Name the metalloid in period 2and 3

Subject: Chemistry, asked on 4/5/18

Solve this :

Q.   What is the Law of Octaves ?                                    

Subject: Chemistry, asked on 25/5/19

Is this box very important to learn ??

Anu
Subject: Chemistry, asked on 13/5/18

What is metalloid ?

Subject: Chemistry, asked on 1/2/18


Q. Sodium and aluminium have atomic numbers 11 and 13 respectively. They are separated by one element in the periodic table, and have valencies 1 and 3 respectively. Chlorine and potassium are also separated by one element in the periodic table (their atomic numbers being 17 and 19, respectively) and yet both have valency 1. Explain.

Subject: Chemistry, asked on 8/4/19

Plz solve this balance the equation

Subject: Chemistry, asked on 18/1/18

specimen paper

Subject: Chemistry, asked on 21/11/18

which period is the longest Period of the present periodic table

Subject: Chemistry, asked on 6/3/18

Please solve the 13 th problem. 
Please do not provide any link.

13. According to atomic structure, what determines which element will be the first and which will be the last in a period? ​
 

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