Periodicity of Chemical Properties

Give the reaction of phosphorus with excess oxygen.

Write the equation for the reaction aluminium with air?

Calculate the oxidation states of magnesium and sulphur in $\mathrm{MgO}, {\mathrm{SO}}_2$.

Calculate the oxidation state of aluminium and silicon in ${\mathrm{Al}}_2{\mathrm{O}}_3, {\mathrm{SiO}}_2$ respectively.

Which of the following compounds is formed when magnesium reacts with water?

Discuss the reaction of magnesium with water?

Which of the following Period $3$ elements react vigorously with chlorine?

Discuss the reactions of Period $3$ elements with chlorine.

${\mathrm{SiO}}_4^{2-}$ compound is formed when silicon reacts with oxygen.

Discuss the reaction of silicon with oxygen.

A small piece of sodium is dropped into a beaker containing water. Which of the following observations are incorrect?

The oxides of non-metals are generally _____ (acidic/basic) in properties.

A metal X is stored under kerosene. When a small piece of it is left open in the air, it catches fire. When the product formed is dissolved in water it turns red litmus blue.
Name the metal X

Name a metal that is stored in kerosene which burns with a yellow flame.

What do you mean by periodicity of elements?

Which of the following statement is correct ?

Which of the following has maximum bond energy?

Which of the following halogen acids is least acidic?

The correct order of reactivity of halogens is

Which of the following does not reflect the periodicity of elements?