Monday, August 22, 2016

Importance Of Periodic Table In Chemistry Exam

What is Periodic Table?

A Periodic Table is a horizontal arrangement comprising of all the chemical elements that are present in the order of their atomic number, electronic configuration and persisting chemical properties.
This ordering represents periodic trends where one row consists of elements that are metals, located to the left of the table and nonmetals to the right. The columns of a table are termed groups, and the different rows are known to as periods. Dmitri Mendeleev developed it to emphasize the periodic trends in the properties of elements.
This table can also be used to determine relationships between various properties of elements and also anticipate the properties of elements that are still to be detected. One can find its application in numerous fields of chemistry and more areas in science. The table comprises of 118 parts as per 2016.
Every chemical element consists of a particular atomic number illustrating number of protons present within the nucleus. Most of the elements are isotopes. They are grouped under a single element, and they are never separated in the table.

Why is Periodic Table Important?

The Periodic Table is said to be the most important part of chemistry as it makes it. All the elements are arranged in an informative order. They are positioned in the order from left to right and also top to bottom in an increasing order of their atomic numbers. This order coincides with the increase in their atomic mass.
Before the discovery of all the elements, this periodic table was useful in the prediction of the physical and chemical properties of all the elements present in the gaps of the table. In today’s world, It is also helpful in predicting the properties of those elements which are not yet discovered. Anyway all these newer elements are said to be highly stable and radioactive and can break down into various similar elements instantly.
This table is even useful for all the students as well as scientists as it is helpful to predict all the kinds of the chemical reactions occurring within an element. The table gives you a clear picture of the figures and facts of every element rather memorizing it. A glance at the periodic table tells about the chemical reactivity of the element, like whether it conducts electricity, soft or hard and along with all its characteristics.

Why Learn Periodic Table?

Learning periodic table is more important as it is systematically arranged to give a lot of information about the elements and the way they relate each other in various ways. Moreover, chemistry is all more about the chemical elements. Hence a good understanding of the chemical elements will discover more about chemistry.
The table describes various properties as given below-
     It predicts the properties of different elements.
     The Columns called as groups and rows known as periods indicate the elemental characteristics.
     The table makes different trends with the properties of elements
     The table gives a piece of information as to how the chemical equations are balanced.

Standard Periodic Table

Mendeleev developed the standard or modern periodic table. Atomic number forms the basis of this periodic table. Elements are usually placed in the increasing order of an atomic number. In the modern periodic table, elements are set in 7 periods and 18 groups. In this chart, elements are categorized into four groups namely representative elements, transition elements, inner transition elements and noble gasses
In the Standard Periodic Table, the elements are indexed according to the increasing atomic number. A new row initially starts when a new electron shell possesses the first electron.
Groups:  are determined by an electronic configuration of an atom. The atomic radii of elements increase from top to bottom of the group. Groups are usually numbered from 1 to 8 starting from leftmost column to rightmost column.
Period: Elements present in the same period exhibits trends in electronegativity, ionization energy, atomic radius and electron affinity. Atomic radius decrease in a period from left to right which in turn causes an increase in ionization energy while moving from left to right across a period. It is produced due to the addition of electron and a proton to each consecutive elements causing an electron to move closer to the nucleus. Electron affinity also displays a slight trend across a period.
Blocks: It can be referred to a distinct region in a periodic table in perception to the sequence, where the shells of electrons are filled. The s - block consists of first 2 groups and p - blocks comprehend of last 6 groups, f- block do not contain any members of the panel and d-block consists from group 3 to 12.
Metals, Nonmetals, and Metalloids: Metals are a solid substance, shiny, fusible materials possessing excellent thermal conductivity. Nonmetals can either be colored or colorless. Metalloids exhibit transitional properties.

How Byju’s Interactive Periodic Table Will Help Students?

The learning methodology plays an important role while you are studying especially with the subjects like chemistry. It involves a heavy memorization of the elements, their origin, characteristics, properties, applications and the reactions. This is not so easy as it looks. Hence the Byju’s Interactive Periodic Table will give you a clear and proper understanding of all the elements in a systematic approach. The table has all the information regarding each and every element as per the modern periodic table.
Apart from this, there are also engaging video sessions and classes held from our experts, wherein an interactive way, each and every topic is explained in an effective manner so that every student understands the basic concept coming within. Know more about the Periodic table and the Organic Chemistry & Inorganic Chmeistry concepts on Byju’s.
Stay on top in every subject with Byju’s classes from India’s best teachers including Byju Raveendran, using state of the art technology for visualization. Understand and master all the concepts of your CBSE Syllabus by installing the Byju's – The Learning App, to your smartphones and tablets and bring the mentor one step closer to you.
For more details call 09243500460 and talk to educational experts for proper guidance.

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1 comment:

  1. You have shared many relevant and informative points. I was knowing about most of them but there are some points which are new for me and have helped me to grab some great information.
    Thanks for sharing.