|
Which one between Na and ${{Na}^{+}}$ would have more size ? Why?
|
|
0
|
779
|
October 20, 2016
|
|
Due to completely filled s-subshell in alkaline earth metals
|
|
1
|
631
|
October 20, 2016
|
|
The calculated electron gain enthalpy values
|
|
1
|
2118
|
October 20, 2016
|
|
Second ionization energy of an element
|
|
1
|
629
|
October 20, 2016
|
|
All alkali metals are solids but hydrogen
|
|
1
|
2573
|
October 20, 2016
|
|
Do you know why Newlands' proposed the law of octaves?
|
|
1
|
2858
|
October 20, 2016
|
|
The relative atomic mass of the middle element in each triad
|
|
1
|
559
|
October 20, 2016
|
|
What relation about elements did Dobereiner want to establish?
|
|
0
|
1495
|
October 20, 2016
|
|
Find out valencies of first 20 elements
|
|
0
|
42905
|
October 20, 2016
|
|
Some main group elements of s-block and p-block
|
|
1
|
968
|
October 20, 2016
|
|
Observe the following table
|
|
1
|
968
|
October 20, 2016
|
|
What are metals and non-metals?
|
|
0
|
700
|
October 20, 2016
|
|
What is Newlands' law of octaves?
|
|
0
|
2599
|
October 20, 2016
|
|
What is Dobereiner triad ? Given two examples to it
|
|
0
|
4224
|
October 20, 2016
|
|
What is modern periodic law?
|
|
0
|
608
|
October 20, 2016
|
|
State Mendeleeff’s periodic law?
|
|
0
|
683
|
October 20, 2016
|
|
How are the elements divided into s, p, d and f - blocks
|
|
1
|
601
|
October 20, 2016
|
|
Explain the limitations of Mendeleeffs periodic table
|
|
0
|
601
|
October 20, 2016
|
|
What is electronegativity?
|
|
1
|
6892
|
October 20, 2016
|
|
What is screening effect or shielding effect?
|
|
0
|
1032
|
October 20, 2016
|
|
Explain the construction of periods in Modern periodic table
|
|
0
|
2389
|
October 20, 2016
|
|
Explain the salient features and achievements
|
|
1
|
850
|
October 20, 2016
|
|
Collect information regarding metallic character of elements
|
|
1
|
6860
|
October 19, 2016
|
|
Collect the information about reactivity of VIIIA group elements
|
|
1
|
6142
|
October 19, 2016
|
|
Aluminium does not react with water at room temperature
|
|
1
|
3463
|
October 19, 2016
|
|
In period 2, elements X is to the right of element Y
|
|
1
|
3486
|
October 19, 2016
|
|
How the positions of elements in the periodic table
|
|
1
|
958
|
October 19, 2016
|
|
Comment on the position of hydrogen in periodic table
|
|
0
|
3707
|
October 19, 2016
|
|
Without knowing the electronic configurations of the atoms of elements
|
|
1
|
1518
|
October 19, 2016
|
|
How do you appreciate the role of electronic configuration of the atoms of elements in periodic classification?
|
|
0
|
3822
|
October 19, 2016
|