EVERYDAY SCIENCE

Detailed explanation-1: -Elements are those substances that are composed of one kind of atom. They cannot be broken down into simpler types of matter by either physical or chemical means. They can exist as atoms (for eg: Neon) or molecules (for eg: Nitrogen).

Detailed explanation-2: -An element is the substance which cannot be broken down further into simpler components by a chemical reaction.

Detailed explanation-3: -Hydrogen and oxygen, on the other hand, cannot be decomposed into simpler substances. They are therefore the elementary, or simplest, chemical substances-elements.

Detailed explanation-4: -An element is a substance that consists of atoms which have the same number of protons, that is, the same atomic number. They are chemically the simplest substances and hence cannot be broken down using chemical methods. For example, hydrogen and oxygen.

Detailed explanation-5: -Complete answer: A compound can be broken down by chemical reactions into simpler substances. For example, We can break water into constituent elements hydrogen and oxygen by electrolysis. Another example is the thermal decomposition of calcium carbonate to obtain calcium oxide and carbon dioxide.