Horizontal rows of periodic table are called

Elements in the first column of the periodic table are called alkali metals. These metals have:

State true or false: The elements of group 17 of the periodic table are called halogens.

The horizontal rows in Mendleev's table were called :

What were the 12 horizontal rows known in the periodic table prepared by Mendeleev ?

Vertical columns of periodic table are known as

The member of periods and group in the long form of periodic table are

With reference of first three periods of the periodic table. Metalloid in 3rd period

Write the names given to the vertical columns and horizontal rows in the Modern Periodic Table. How does the metallic charcter of elements very 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 pupport of your answer in the above two cases.

State the fundamental property on which the modern periodic table or long form of periodic table is based.

State the fundamental property on which the modern periodic table or long form of periodic table is based.