Classes

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Class 9Class 10First YearSecond Year

Math

Physics

Chemistry

01Fundamentals Of Chemistry

672 Doubt Solutions

02Structure Of Atoms

1344 Doubt Solutions

03Periodic Table And periodicity Of Properties

2016 Doubt Solutions

04Structure Of Molecules

2688 Doubt Solutions

05Physical States Of Matter

3360 Doubt Solutions

06Solutions

4032 Doubt Solutions

07Electrochemistry

4704 Doubt Solutions

08Chemical Reactivity

5376 Doubt Solutions

7. Why and how are elements arranged in 4^{\text {th }} period?

$Explain the contributions of Mendeleev for the arrangement of elements in his Periodic Table.$

$Justify the statement bigger size atoms have more shielding effect thus low ionization energy.$

$6. According to Mosely the chemical properties of elements are the periodic function of their :(a) Atomic Size(b). Atomic Mass(c) Atomic Radius(d). Atomic Number$

$4. Determine the location of families on periodic table.$

$What do you mean by blocks in a periodic table and why elements were placed in blocks?$

$4. Justify that periodicity of properties dependent upon number of protons in ar atom?$

Class 9 Chemistry Periodic Table And periodicity Of Properties