Question

State modern periodic law. What are the main features of the long form of the periodic table?

Answer 1

Hint : To answer this question, we first need to understand what a periodic table is. The periodic table, commonly known as the periodic table of elements, is a tabular representation of chemical elements organized by atomic number, electron configuration, and recurrent chemical properties. The table's structure reveals periodic patterns.

Complete Step By Step Answer:
The physical and chemical properties of elements are periodic functions of their atomic numbers, according to the contemporary periodic law. Across each row, scientists placed elements in increasing order of their atomic numbers from left to right.
The modern periodic table, often known as the long version, is based on the modern periodic law. The table is a list of elements arranged in ascending order of their atomic numbers. The periodic table in its current form is known as the contemporary periodic table. It has 18 vertical columns and seven horizontal rows.
Groups in the Periodic Table of the Modern Era:
In the modern or long form of the periodic table, groups are the vertical columns.
The periodic table is divided into 18 groups.
These groupings are numbered one through eighteen.
Each group is made up of components with the same electrical arrangement on the outer shell.
Periods in the Modern Periodic Table: In the modern or long form of the periodic table, periods are the horizontal rows.
The periodic table has seven periods.
From top to bottom, they are numbered 1, 2, 3, 4, 5, 6, and 7.
Only two elements make up the first period: hydrogen and helium.
The second and third periods each have eight elements.
The 4th and 5th periods each have 18 elements, whilst the 6th period has 32 elements. Four new elements have been added to the periodic table's seventh period. 113–Nihonium, 115–Meconium, 117–Tennessine, and 118–Oganesson are the elements. With 32 elements, this addition brings the 7th phase to a close.
A separate panel at the bottom of the lengthy version of the periodic table. It is made up of 14 Lanthanoids, which are 6th period elements. The actinides are a group of 14 elements in the seventh period.
The number of shells or energy levels in an atom of an element is represented by each period.
So, we conclude that the periodic table is a table that lists all of the chemical elements in order of atomic number, starting with hydrogen and ending with oganesson. The number of protons in the nucleus of an atom of a given element is its atomic number.

Note :
To recap, the periodic table is significant because it is organized to provide a wealth of information about elements and their relationships in a single, easy-to-understand reference. The table can be used to guess the properties of elements that haven't been discovered yet.