Question

Q1. Which among the substances are elements?

Answer 1

Answer:

Any substance that contains only one kind of an atom is known as an element. Because atoms cannot be created or destroyed in a chemical reaction, elements such as phosphorus (P4) or sulfur (S8) cannot be broken down into simpler substances by these reactions.

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Answer 2

A chemical element is a pure substance that consists of one type of atom.

Explanation:

• A substance pertains to that which has a definite chemical composition and distinct properties and made up of elements in combination with another or the same elements.

• Elements are the simplest complete chemical substances. Each element corresponds to a single entry on the periodic table.

• An element is a material that consists of a single type of atom. Each atom type contains the same number of protons.

• Elements cannot be divided into smaller units without large amounts of energy.

• The chemical elements are divided into the metals, the metalloids, and the non-metals.

• Ex: Sodium (Na), Argon (Ar), Sulfur (S) etc.