Test: Periodic Classification of Elements - UPSC MCQ

Dmitri Mendeleev is credited with the development of the periodic table. He arranged the elements in order of increasing atomic weight and noticed a pattern of recurring properties.

The term 'periodic' refers to the recurring trends in element properties. This pattern repeats each time the elements move one period down.

The modern periodic table contains seven periods, or horizontal rows of elements.

Iron, located in the d-block of the periodic table, is roughly at the center.

The Noble Gases are located in Group 0 (or Group 18 in some versions) of the periodic table.

A horizontal row in the periodic table is called a period.

The sixth period of the periodic table contains the most elements, 32 in total.

The placement of elements in the periodic table is determined by their atomic weight, atomic number, and electron configuration.

John Newlands proposed the law of octaves, which was an early attempt at classifying the elements.

Hydrogen does not fit into any group in Mendeleev’s periodic table due to its unique properties.

The halogens are located in Group 17 of the periodic table.

The modern periodic law is based on atomic number, which is the number of protons in an atom's nucleus.

There are 18 groups, or vertical columns, in the periodic table.

Hydrogen has the atomic number 1, which means it is the first element in the periodic table.

Radon, a Noble Gas, is located at the bottom right corner of the periodic table.

The d-block of the periodic table contains the transition metals.

Glenn T. Seaborg is credited with the discovery of the lanthanides and actinides.

The third shell of an atom can accommodate a maximum of 18 electrons.

The atomic number of Argon, which indicates the number of protons in its nucleus, is 18.

Element 118 in the periodic table is named Oganesson.