Question

define compound,element and mixtures in a simple way

Answer 1

Element-element is a substance that cannot be broken down into simpler components by any non-nuclear chemical reaction. An element is uniquely determined by the number of protons in the nuclei of its atoms. 

Compound- A compound is formed by the chemical reaction of two or more elements and can be seperated by electro-chemical reactions only

Mixtures- It's just a mixture of elements where the elements can be seperated by physical methods such as hand picking etc. No new substance or chemical properties for any substance is formed.

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Answer 2

Hey!
Here is your a answer!

Compound- It is a pure substance, it is made by chemical combination of two or more substances.

Mixture- It in an impure substance, it I made by physical composition of two or more substance such as sand and water solution

Element- It is also known as alphabets of CHEMISTRY, they are classified into- Metals, Non-metals and metalloids. Eg; Boron, silicon and everything in the periodic table.

Hope it helps! This is only the easy way by which you can learn it.