How does carbon occur in nature? Describe its important physical and chemical properties.

How does hydrogen occur in nature?

How is heavy water prepared from ordinary water ? Discuss its important physical and chemical properties.

How does boron occur in nature and how is it prepared ? Describe its important chemical properties and uses.

Discuss gradation in physical and chemical properties among halogens.

Why do elements in the same group have similar physical and chemical properties?

How does chlorine occur in nature ? Give names and formulae of its important minerals.

How does phototropism occur in plants?

According to Mendeleev's periodic law physical and chemical properties are function of

The elements of group 1 describe, more clearly then only group of elements, the effects of increasing the size of atoms or ions on the physical and chemical properties.The chemical and physical properties of the elements are closely related to their electronic structures and sizes.These metals are highly electropositive and thus form very strong bases, and have quite stable oxo-salts.In the manufacturing of sodium hydroxide, chlorine and sodium carbonate, the sodium chloride is used as starting material. Which of the following has the highest solubility in water ?

The first element in a group of p-block of the periodic table often displays different physical and chemical properties from the heavier members of the group. In the light of this statement give comparative explanations for the following: Nature of oxides of boron and aluminum