|
Which one between Na and ${{Na}^{+}}$ would have more size ? Why?
|
|
0
|
687
|
October 20, 2016
|
|
Due to completely filled s-subshell in alkaline earth metals
|
|
1
|
566
|
October 20, 2016
|
|
The calculated electron gain enthalpy values
|
|
1
|
1934
|
October 20, 2016
|
|
Second ionization energy of an element
|
|
1
|
570
|
October 20, 2016
|
|
All alkali metals are solids but hydrogen
|
|
1
|
2502
|
October 20, 2016
|
|
Do you know why Newlands' proposed the law of octaves?
|
|
1
|
2694
|
October 20, 2016
|
|
The relative atomic mass of the middle element in each triad
|
|
1
|
479
|
October 20, 2016
|
|
What relation about elements did Dobereiner want to establish?
|
|
0
|
1400
|
October 20, 2016
|
|
Find out valencies of first 20 elements
|
|
0
|
39281
|
October 20, 2016
|
|
Some main group elements of s-block and p-block
|
|
1
|
835
|
October 20, 2016
|
|
Observe the following table
|
|
1
|
795
|
October 20, 2016
|
|
What are metals and non-metals?
|
|
0
|
630
|
October 20, 2016
|
|
What is Newlands' law of octaves?
|
|
0
|
2521
|
October 20, 2016
|
|
What is Dobereiner triad ? Given two examples to it
|
|
0
|
4132
|
October 20, 2016
|
|
What is modern periodic law?
|
|
0
|
543
|
October 20, 2016
|
|
State Mendeleeff’s periodic law?
|
|
0
|
605
|
October 20, 2016
|
|
How are the elements divided into s, p, d and f - blocks
|
|
1
|
543
|
October 20, 2016
|
|
Explain the limitations of Mendeleeffs periodic table
|
|
0
|
531
|
October 20, 2016
|
|
What is electronegativity?
|
|
1
|
6767
|
October 20, 2016
|
|
What is screening effect or shielding effect?
|
|
0
|
956
|
October 20, 2016
|
|
Explain the construction of periods in Modern periodic table
|
|
0
|
2317
|
October 20, 2016
|
|
Explain the salient features and achievements
|
|
1
|
765
|
October 20, 2016
|
|
Collect information regarding metallic character of elements
|
|
1
|
6593
|
October 19, 2016
|
|
Collect the information about reactivity of VIIIA group elements
|
|
1
|
5596
|
October 19, 2016
|
|
Aluminium does not react with water at room temperature
|
|
1
|
3304
|
October 19, 2016
|
|
In period 2, elements X is to the right of element Y
|
|
1
|
3325
|
October 19, 2016
|
|
How the positions of elements in the periodic table
|
|
1
|
880
|
October 19, 2016
|
|
Comment on the position of hydrogen in periodic table
|
|
0
|
3617
|
October 19, 2016
|
|
Without knowing the electronic configurations of the atoms of elements
|
|
1
|
1435
|
October 19, 2016
|
|
How do you appreciate the role of electronic configuration of the atoms of elements in periodic classification?
|
|
0
|
3633
|
October 19, 2016
|