`_13Al` is a metal, `_14Si` is a metalloid and `_15P` is a nonmental.

Select the appropriate options and complete the following paragraph. (metals, nonmetals, metalloids, four, seven, s-block, p-block, d-block, f-block) On the basis of electronic configuration, elements in the modern periodic table are classified into ________ block. Groups 1 and 2 elements are included in _______ and all these elements are metals (except hydrogen). Group 13 to 18 elements are included in ________. This block contains metals, nonmetals and metalloids. Groups 3 to 12 elements are included in _______ and all these elements are _______. elements shown at the bottom of the periodic table i.e., Ianthanides and actinides constitute ______ and all these elements are metals.

Metals leaching from low quality metalloids can be converted into compound with the help of

The angular displacement of a second hand of a clock in 15 sin SI unit is

A metal sphere of radius 1cm is charged with 3.14 mu C . Find the electric intensity at a distance 1 m from centre of metal sphere.

Write down the electronic configuration of the following elements from the given atomic numbers. Answer the following question with explanation. "_3Li, _14Si, _2He, _11Na, _15P . Which of these elements belong to period 3?

An alloy contatining 1- 15 % Mg and 85-99% Al is known as ______ .

Answer the following questions: Classify the following elements into Metals, Nonmetals, Metalloids : (P,C,N),(Ca,Fe,Al),(Si,Ge,Sb),(K,Mg,Na).

Write down the electronic configuration of the following elements from the given atomic numbers. Answer the following questions with explanation. "_13Al,_14Si,_11Na,_12Mg,_16S. Which of the above elements has the highest metallic character?

In /_\ABC , if a=13 , b=14 , c=15 then find the value of: sinA