Question

What is Group and Period in the Periodic Table?

Answer 1

Hint : Since the Periodic Table was first developed by Mendeleev and Moseley, the periodic table has undergone significant changes. Many new elements have been discovered, and others have been synthesized artificially. Each one belongs to a group of elements with similar characteristics. The periodic table is a list of elements arranged in order of their atomic numbers so that elements with similar atomic numbers can be found together with properties that appear in the same vertical column or group.

Complete Step By Step Answer:
The periodic table's horizontal row is called a period. The periodic table is divided into seven periods, each starting on the far left. When a new principal energy level begins to fill with electrons, a new period begins. Period 1 only has two elements (hydrogen and helium), whereas periods 2 and 3 each have eight.
There are 18 elements in Periods 4 and 5. Because the two bottom rows that are separated from the rest of the table belong to those periods, they have 32 elements. They're pulled out to make the table itself fit on a single page more easily.
Based on the organization of the outer shell electrons, a group is a vertical column of the periodic table. There are 18 groups in total. You should be familiar with both of the numbering systems that are commonly used to designate groups. The letters A and B are used in the traditional system in the United States. The first two groups are 1A and 2A, respectively, while the last six groups are 3A through 8A.
The middle groups' names begin with the letter B. In Europe, however, there was a slightly different system in place. To avoid confusion, the International Union of Pure and Applied Chemistry (IUPAC) decided on a simple 1 through 18 system from left to right as the official system for numbering groups. Many periodic tables display both systems at the same time.
Thus, The periodic table is a system for arranging materials. It's worth noting that they're organized into columns and rows. The horizontal rows (which run from left to right) are referred to as ‘periods,' and the vertical columns are referred to as ‘groups' (going from up to down).

Note :
The periodic table contains 118 confirmed elements. Ninety of them are found in nature, while the rest are entirely man-made. Technetium was the first element created by humans. With an atomic weight of 1, hydrogen is the lightest element, which is why it is found in the periodic table's top-left corner.