Define the following :-
(a) Atom
(b) Molecule
(c) Chemical reaction
(d) Compound
(e) Element
(f) Mixture
(g) Displacement Reaction
(h) Neutralisation Reaction
(i) Combination Reaction
(j) Chemical Formula
Answers
Answer:
n atom is the smallest unit of ordinary matter that forms a chemical element. Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms. Atoms are extremely
Explanation:
Two atom is called molecule
Answer ::
★ Define the following :-
(a) Atom
➳ An atom is the smallest particle of an element that takes part in chemical reaction. It maintains its chemical identity throughout all chemical and physical changes.
(b) Molecule
➳ The smallest unit of a substance which is capable of independent existence and shows all the properties of that substance is called a molecule.
(c) Chemical reaction
➳ Chemical reaction occurs when one or more substances undergo changes in identity and one or more substances are produced. a chemical reaction is a chemical change.
(d) Compound
➳ A compound is a pure substance which is made up of two or more elements combined chemically in a fixed ratio and it can be broken down into elements by chemical methods only. a compound is homogeneous in nature.
(e) Element
➳ An element is a pure substance which cannot be broken down into to simpler substance by any known physical or chemical method. An element only consists of one kind of atoms.
(f) Mixture
➳ A mixture is obtained by two or more substances in any proportion ( elements or compounds ). Mixture are of two types :-
- Homogeneous mixture
- Heterogeneous mixture
(g) Displacement Reaction
➳ Displacement reaction is a chemical reaction in which an element replaces another element in a compound and takes its place.
(h) Neutralisation Reaction
➳ Neutralisation Reaction is is a chemical reaction in which an acid ( or an acid oxide ) reacts with a base ( or base oxide ) to form salt and water.
(i) Combination Reaction
➳ A combination reaction is a chemical reaction in which two reactants combine to form a single product.
(j) Chemical Formula
➳ A chemical formula is a symbol representation of a molecule of a compound.