What is periodic table?

Question

Answer

A history of 118elements....

Answer

Periodic table is the arrangement of elements in organised fashion.

Answer

The periodic table of the chemical elements is a list of known Elements. ... The atomic number of an element is the same as the number of protons in that particular nucleus of an atom. In the periodic table the elements are arranged into periods and groups. A row of elements across the table is called a period.

Answer

A table of the chemical elements arranged in order of atomic number, usually in rows, so that elements with similar atomic structure (and hence similar chemical properties) appear in vertical columns.

Answer

The Periodic Table is a tabular arrangement of chemical elements organized based on their atomic number, electron configuration, and recurring chemical properties. It provides a systematic way to classify and organize the elements, making it easier to study and understand their properties and behaviors.

Structure:
The Periodic Table is structured into rows called periods and columns called groups or families. There are seven periods, numbered from 1 to 7, and eighteen groups, labeled from 1 to 18. Elements in the same group share similar chemical properties, while elements in the same period have the same number of electron shells.

Atomic Number:
Each element in the Periodic Table is assigned an atomic number, which represents the number of protons in the nucleus of its atom. The atomic number determines the element's identity and its position in the Periodic Table. Elements are arranged in ascending order of atomic numbers from left to right and top to bottom.

Periods:
As mentioned earlier, the Periodic Table is divided into seven periods. The number of elements in each period increases from 2 in the first period to 32 in the seventh period. The periods are further divided into blocks based on the subshell being filled.

Groups/Families:
The elements in the Periodic Table are grouped into families or groups. There are 18 groups in total, each with a unique label. Elements in the same group usually have similar properties and exhibit trends in their chemical reactivity. For example, Group 1 consists of alkali metals, which are highly reactive and have one valence electron.

Properties:
The Periodic Table provides valuable information about the properties of elements. It allows scientists to predict the behavior of an element based on its position in the table. Elements on the left side of the Periodic Table are typically metals, whereas elements on the right side are non-metals. Metalloids are found along the zigzag line separating the metals and non-metals.

Trends:
The Periodic Table also reveals trends in elemental properties. For example, as you move across a period from left to right, the atomic radius generally decreases, the electronegativity increases, and the ionization energy increases. These trends help understand and explain the behavior of elements within the table.

Uses:
The Periodic Table is an essential tool for chemists, physicists, and other scientists. It allows them to study and analyze the properties and behavior of elements, formulate chemical equations, predict reactions, and even discover new elements. It serves as a fundamental reference for understanding the building blocks of matter and their interactions.

In conclusion, the Periodic Table serves as a fundamental framework for organizing and understanding the properties of chemical elements. It enables scientists to explore the relationships, trends, and behaviors of elements, facilitating advancements in various scientific fields.

Answer

The arrangement of elements in order of increasing atomic masses, with elements having similar properties in vertical columns is known as periodic table.

Similar Class 9 Doubts

What are the first twenty elements in periodic table?

Name the first 50 elements of periodic table?

Periodic table

What are the defects in modern periodic table?

what is the use of periodic table in chemistry

Top Courses for Class 9View all

Science Class 9

Social Studies (SST) Class 9

Mathematics (Maths) Class 9

English Grammar Advanced

English Class 9

Top Courses for Class 9

Top Courses for Class 9

Suggested Free Tests

Related Content

Class 9 Study Material

Class 9 Subjects

Competitive Examinations for Class 9

NCERT Books

NCERT Solutions

Reference Books for Class 9

Other Popular Exams

Company