Hydrogen can be placed in group 1 and group 17 in the periodic table. Why ?

Which of the following statements about the modern periodic table are incorrect ? (a) The elements in Modern periodic table are arranged on the basis of their decreasing atomic number. (b) The elements in Modern periodic table are arranged on the basis of their increasing atomic masses. (c) Isotopes are placed in adjoining groups in the periodic table. (d) The elements in the modern periodic table are arranged on the basis of their increasing atomic number.

A trend common to both groups 1 and 17 elements in the periodic table as atomic number increases is

How many periods and groups are there in the modern periodic table ?

The elements of group 13 to 18 of the periodic table are known as

How are the elements arranged into groups and periods in the modern periodic Table ? Elements in a group posses similar properties , but elements in a period do not show similarites in their properties . Why ?

Astatine is the element below iodine in the group 17 of the periodic table. Which of the following statements (s) is ( are ) true for astatine ?

Group I A elements in the periodic table are called

Nitrogen (Z=7) is the element of group V of the periodic table. Which of the following is the atomic number of the next element in the group ?

Elements of the same vertical group of the periodic table have

A property which progressively increases down a group in the periodic table is :