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In the modern periodic table, if an element with atomic number 'X' is an inert gas then an element with atomic number (X-1) will be placed in:

Maximum number of elements in a particular period depends upon :

a)how electrons are filled into various shells

b)the formula of 2n

The electronic configuration of Phosphorus (atomic number 15) will be:

Describe how you could show that phosphorus acid, H₃PO₃ is a weaker acid than Hydrochloric acid.

You have been provided with three test tubes. One of them contains distilled water and the other two have an acidic solution and a basic solution respectively. If you are given only red litmus paper, how will you identify the contents of each test tube?

The percentage compostion of sodium phosphate as determined by analysis is 42.1% sodium, 18.9% phosphorus and 39% oxygen. Find the empirical formula of the compound.

In laboratory, silicon can be prepared

1. What is the difference between moleule and Covalent bond if there's not a difference then Give similarities between them ?

2. How CO2 gas is an acidic ?

Please give in detailed solution....

State the characteristics of groups in the periodic table.

The height of a right circular cylinder is 10.5 m. 3 times the sum of the areas of its 2 circular faces is twice the area of the curved surface. Find the volume of the cylinder.

Calculate the molarity of KOH in a solution prepared by dissolving 5.6 gm in enough water to form 500 mL of solution.

Silver jewellery becomes black on prolonged exposure to air, it is due to the formation of

How many bonds are there in $C{O}_2$ molecule?

Assertion: In froth flotation process sodium ethyl xanthate is used as collector.

Reason: Sulphide ores are water soluble.