Earlier Attempts of Classification of Elements
Earlier Attempts of Classification of Elements
Periodic Classification of Elements: Elements are the building blocks of all substances. There are 118 elements known at present, out of which 98 are naturally occurring. In order to study the properties of all these elements separately, scientists felt the necessity to group elements having similar characteristics together. So, all the elements have been divided into a few groups in such a way that elements in the same group have similar properties of elements is reduced the study of a few groups of elements periodic classification of elements.
In this chapter, we will study various attempts which have been made to classify the elements from time to time and finally we will study the modern classification of elements.
Earlier Attempts to Classify Elements:
Several attempts have been made to classify the elements according to their properties.
Some important of them are discussed below:
Lavoisier’s Classification (1789):
It is one of the earliest attempts to classify elements. Lavoisier divided elements into two main groups, called metals and non-metals.
Which of the following are correct : (a) Mendaleev divided elements into two main groups, called metals and non-metals. (b) Lavoisier divided elements into two main groups, called metals and non-metals. (c) There are 118 elements known at present, out of which 98 are naturally occurring. | |||
| Right Option : B | |||
| View Explanation | |||
Which of the following are correct : (a) Lavoisier divided elements into two main groups, called metals and non-metals. (b) There are 118 elements known at present, out of which 98 are naturally occurring. | |||
| Right Option : C | |||
| View Explanation | |||
There are 118 elements known at present, out of which ____________________are naturally occurring. | |||
| Right Option : D | |||
| View Explanation | |||
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