|
Which one between Na and ${{Na}^{+}}$ would have more size ? Why?
|
|
0
|
725
|
October 20, 2016
|
|
Due to completely filled s-subshell in alkaline earth metals
|
|
1
|
596
|
October 20, 2016
|
|
The calculated electron gain enthalpy values
|
|
1
|
2042
|
October 20, 2016
|
|
Second ionization energy of an element
|
|
1
|
599
|
October 20, 2016
|
|
All alkali metals are solids but hydrogen
|
|
1
|
2539
|
October 20, 2016
|
|
Do you know why Newlands' proposed the law of octaves?
|
|
1
|
2789
|
October 20, 2016
|
|
The relative atomic mass of the middle element in each triad
|
|
1
|
517
|
October 20, 2016
|
|
What relation about elements did Dobereiner want to establish?
|
|
0
|
1449
|
October 20, 2016
|
|
Find out valencies of first 20 elements
|
|
0
|
40175
|
October 20, 2016
|
|
Some main group elements of s-block and p-block
|
|
1
|
901
|
October 20, 2016
|
|
Observe the following table
|
|
1
|
885
|
October 20, 2016
|
|
What are metals and non-metals?
|
|
0
|
658
|
October 20, 2016
|
|
What is Newlands' law of octaves?
|
|
0
|
2558
|
October 20, 2016
|
|
What is Dobereiner triad ? Given two examples to it
|
|
0
|
4165
|
October 20, 2016
|
|
What is modern periodic law?
|
|
0
|
571
|
October 20, 2016
|
|
State Mendeleeff’s periodic law?
|
|
0
|
639
|
October 20, 2016
|
|
How are the elements divided into s, p, d and f - blocks
|
|
1
|
563
|
October 20, 2016
|
|
Explain the limitations of Mendeleeffs periodic table
|
|
0
|
557
|
October 20, 2016
|
|
What is electronegativity?
|
|
1
|
6815
|
October 20, 2016
|
|
What is screening effect or shielding effect?
|
|
0
|
981
|
October 20, 2016
|
|
Explain the construction of periods in Modern periodic table
|
|
0
|
2349
|
October 20, 2016
|
|
Explain the salient features and achievements
|
|
1
|
804
|
October 20, 2016
|
|
Collect information regarding metallic character of elements
|
|
1
|
6743
|
October 19, 2016
|
|
Collect the information about reactivity of VIIIA group elements
|
|
1
|
5868
|
October 19, 2016
|
|
Aluminium does not react with water at room temperature
|
|
1
|
3364
|
October 19, 2016
|
|
In period 2, elements X is to the right of element Y
|
|
1
|
3424
|
October 19, 2016
|
|
How the positions of elements in the periodic table
|
|
1
|
912
|
October 19, 2016
|
|
Comment on the position of hydrogen in periodic table
|
|
0
|
3659
|
October 19, 2016
|
|
Without knowing the electronic configurations of the atoms of elements
|
|
1
|
1468
|
October 19, 2016
|
|
How do you appreciate the role of electronic configuration of the atoms of elements in periodic classification?
|
|
0
|
3742
|
October 19, 2016
|