Question

1) Why is classification of elements essential?
2) Pick out only pure substances from the following .- Tap Water, air, salt, vegetable oil,sugar, distil water, gold, tea, carbon dioxide.
3)How are elements classified? Name them​

Answer 1

Answer:

Explanation:

1) It enables chemists to analyse and understand the properties of the elements and their compounds more systematically and orderly. It enables chemists to predict the properties of the elements and their compounds based on their positions in the Periodic Table, and vice versa.

2) salt, sugar, distilled water, gold

3) Elements can be classified as metals, metalloids, and nonmetals, or as a main-group elements, transition metals, and inner transition metals. Groups are numbered 1–18 from left to right.