Advertisements
Advertisements
प्रश्न
What is the number of elements in the 1st period?
उत्तर
There are two elements in the first period.
APPEARS IN
संबंधित प्रश्न
Write the names given to the vertical columns and horizontal rows in the Modern Periodic Table. How does the metallic character of elements vary on moving down a vertical column? How does the size of atomic radius vary on moving left to right in a horizontal row? Give reason in support of your answer in the above two cases.
Fill in the following blank with suitable word:
The horizontal rows in a periodic table are called ...............
What is the major characteristic of the first elements in the periods of the periodic table? What is the general name of such elements?
On the basis of electronic configuration, how will you identify chemically similar elements?
Name the type of elements which have two electrons in the outermost orbit.
Give the symbol and valency of the following element and radical.
Sulphite
State the number of elements in Period 2 of the Periodic Table.
The K and L shells of the elements Na and Mg contain electrons.
Which of the following elements will form an acidic oxide?
Give reason for the following:
Inert gases do not form ion.
