NCERT Solutions
Board Paper Solutions
Ask & Answer
School Talk
Login
GET APP
Login
Create Account
Popular
Latest
Expert Answers
ALL
Siddhi
Subject: Science
, asked on 17/3/18
Advantage of dobereiner’s attempt: atomic weight of any one element can be easily found if the rest of them are given and It led to the classification of elements with similar chemical properties. IS THIS RIGHT?? PLZZZ TELL ASAP!!!
Answer
2
Raghav Singh
Subject: Science
, asked on 14/3/18
In the examination of science will we get questions from elements above 20 , any chances? I am asking as their configuration is different and i guess we will study about these in next class.
Answer
3
Raghav Singh
Subject: Science
, asked on 14/3/18
Please mnemonics of Dobereiner's Triads , i need it.
Answer
2
Star Boy
Subject: Science
, asked on 14/3/18
What type of questions will be asked from the chapter :- periodic classification
Answer
1
Abhishek
Subject: Science
, asked on 14/3/18
Why isotopes were not given any place in the mandeleev's periodic table?
Answer
3
Manthra Bhaskar 💙🖤🖤ðŸ...
Subject: Science
, asked on 13/3/18
What happens to the molecular formula of the chloride a)acroo a period b)down the group
Answer
1
Manthra Bhaskar 💙🖤🖤ðŸ...
Subject: Science
, asked on 13/3/18
What happens to valency of forming oxides a)across a period b)down the group
Answer
1
J Jerone Gonsalvez
Subject: Science
, asked on 13/3/18
Ques no. 15 s fast
​Q15. Two elements 'P' and 'Q' belong to the same period of the Modern Periodic T able and are in Group -I and Group - 2 respectively. Compare their following characteristics its tabular form:
(a) The number of valence electrons in their atoms
(b) The sizes of their atoms
(c) Their metallic characters
(d) Their tendencies to lose electrons
(e) The formula of their oxides
(f) The formula of their chlorides
Answer
1
Nazreen
Subject: Science
, asked on 13/3/18
Which element among Chlorine and Argon has greater atomic mass. Why?
Answer
4
Dipesh Kumar Karesia
Subject: Science
, asked on 12/3/18
How to find a group number?? Give example of nitrogen..
Answer
1
Payal Arora
Subject: Science
, asked on 12/3/18
Out of Boron and aluminum, which is more reactive and why ?
Answer
3
Shriyanshu Padhi
Subject: Science
, asked on 12/3/18
The electronic configuration of calcium (20) is given as 2,8,8,2 but we know that the third shell has the maximum capacity of holding 1 electrons , so why iant the e.c of calcium 2 ,8 ,10?
Answer
2
Moin
Subject: Science
, asked on 8/3/18
what is meant by atomic radius? explain why it decreases across a period?
Answer
1
Anu
Subject: Science
, asked on 7/3/18
dear experts ans the following:
1.give the relation between or the similarity between newlands law of octaves ; mendeleevs periodic table ; doberieners law of triads
Answer
2
Aditya Anand
Subject: Science
, asked on 6/3/18
Does noble gas has the largest atomic size in their respective period even though the atomic size decreases from moving across a period? If this is true, then will atomic size of Ar is greater than Na?
Answer
6
1
2
3
4
5
Next
What are you looking for?
​Q15. Two elements 'P' and 'Q' belong to the same period of the Modern Periodic T able and are in Group -I and Group - 2 respectively. Compare their following characteristics its tabular form:
(a) The number of valence electrons in their atoms
(b) The sizes of their atoms
(c) Their metallic characters
(d) Their tendencies to lose electrons
(e) The formula of their oxides
(f) The formula of their chlorides
1.give the relation between or the similarity between newlands law of octaves ; mendeleevs periodic table ; doberieners law of triads