NCERT Solutions
Board Paper Solutions
Ask & Answer
School Talk
Login
GET APP
Login
Create Account
Popular
Latest
Expert Answers
ALL
Kartik Agarwal
Subject: Chemistry
, asked on 29/9/17
The successive ionization enthalpy of element are given as 240,1000,1800,4500,7000 identify the element.
Answer
1
Sreelakshmi
Subject: Chemistry
, asked on 29/9/17
The variation in the atomic radii of the d and f blocks in a series is much less than that in s and p block elements. Why
Answer
1
Vedant
Subject: Chemistry
, asked on 22/9/17
Among the following elements (Whose electronic configuration is given below) the one having the highest ionisation energy is
(1) [Ne] 3s
2
3p
3
(2) [Ne] 3s
2
3p
4
(3) [Ne] 3s
2
3p
5
(4) [Ar] 3d
10
4s
2
4p
2
Answer
1
Vedant
Subject: Chemistry
, asked on 22/9/17
Pls answer Q127:
127. Among the following elements (whose electronic configuration is given below ) the one having the highest ionisation energy is.
(1) [Ne] 3s
2
3p
3
(2) [Ne] 3s
2
3p
4
(3) [Ne] 3s
2
3p
5
(4) [Ar] 3d
10
4s
2
4p
2
Answer
2
Parameswaran Namboothiri
Subject: Chemistry
, asked on 14/9/17
an element x with atomic number 112 . predict its electronic configuration and suggest the group in which this element would be placed
how to do this type of questions in exams any easy method is there please explain in detail
Answer
1
Deepshikha
Subject: Chemistry
, asked on 13/9/17
46 no.
Answer
2
Deepshikha
Subject: Chemistry
, asked on 13/9/17
42 no.
Q.42. How many element having 4f electron in actinoid series :-
(1) 28
(2) 14
(3) Zero
(4) None of these
Answer
1
Vedant
Subject: Chemistry
, asked on 13/9/17
Please answer Asap with explanation.
6. The electronic configuration of some neutral atoms are given below:-
(A) 1s
2
2s
1
(B) 1s
2
2s
2
2p
3
(C) 1s
2
2s
2
2p
5
(D) 1s
2
2s
2
2p
6
3s
1
In which of these electronic configuration would you expect to have highest :—
(i) IE
1
(ii) IE
2
1) C, A 2) B, A 3) C, B 4) B, D
Answer
1
Vedant
Subject: Chemistry
, asked on 12/9/17
Why is the electronic configuration of f block or d block referred to as (n-2)f 0-14 and (n-1)d 0-10. I understand that d subshell can have electrons from 1 to a max of 10 electrons but whats the meaning of (n-1) or (n-2).
Answer
1
Vedant
Subject: Chemistry
, asked on 12/9/17
Please Explain me the meaning of Points d) and e). :
Slater's rule to know screening constant (
σ
):
(d) Screening effect of (n-1) penultimate orbit s, p,d electrons is 0.85
(e) Screening effect of (n-2) and below all of e
-
present in s, p, d, f is 1.0 From top to bottom in a group Z
eff
remain constant
Group
Element
Li
Na
K
Rb
Cs
Z
eff
1.30
2.20
2.20
2.20
2.20
Answer
1
Bharath Gaikwad
Subject: Chemistry
, asked on 11/9/17
In Methane, 2 Hydrogens are removed and substituted by Methyl and Vinyl groups. The other two Hydrogens are substituted by 1 CH2OH & Cl group. What is the IUPAC name of the compound.
Answer
1
Tulsi Mehta
Subject: Chemistry
, asked on 11/9/17
which has low Ionization enthalpy lithium or boron?
Answer
1
Archit Anand K.p.
Subject: Chemistry
, asked on 8/9/17
why are noble elements larger than halogen?
Answer
3
Ian Colaco
Subject: Chemistry
, asked on 8/9/17
Write any four characteristics of s-block elements.
Answer
2
Ian Colaco
Subject: Chemistry
, asked on 8/9/17
Draw the shapes of 2S and 2P orbitals. Indicate nodal plane in case of 2S and 2px
Answer
1
Prev
1
2
3
4
5
Next
What are you looking for?
(1) [Ne] 3s2 3p3 (2) [Ne] 3s2 3p4 (3) [Ne] 3s2 3p5 (4) [Ar] 3d10 4s2 4p2
127. Among the following elements (whose electronic configuration is given below ) the one having the highest ionisation energy is.
(1) [Ne] 3s2 3p3 (2) [Ne] 3s2 3p4
(3) [Ne] 3s2 3p5 (4) [Ar] 3d10 4s24p2
how to do this type of questions in exams any easy method is there please explain in detail
Q.42. How many element having 4f electron in actinoid series :-
(1) 28
(2) 14
(3) Zero
(4) None of these
6. The electronic configuration of some neutral atoms are given below:-
(A) 1s2 2s1 (B) 1s22s2 2p3 (C) 1s2 2s2 2p5 (D) 1s2 2s2 2p6 3s1
In which of these electronic configuration would you expect to have highest :—
(i) IE1 (ii) IE2
1) C, A 2) B, A 3) C, B 4) B, D
Slater's rule to know screening constant ():
(d) Screening effect of (n-1) penultimate orbit s, p,d electrons is 0.85
(e) Screening effect of (n-2) and below all of e- present in s, p, d, f is 1.0 From top to bottom in a group Zeff remain constant