notes of elements compound and chemical equations
Answers
Explanation:
Elements are found everywhere. A compound is a substance formed when two or more chemical elements are chemically bonded together. Compounds can be decomposed chemically into their constituent elements.It has unique properties that are different from the properties of its individual elements.
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Answer:
Elements and compounds are the two forms in which pure substances exist.
Element Definition:
Elements – Elements constitute the simplest chemical substances in which all the atoms are exactly the same.
Compound Definition:
Compounds – Compounds are chemical substances made up of two or more elements that are chemically bound together in a fixed ratio.
Chemistry is the study of the structures, physical properties, and chemical properties of material substances. It is very important to understand that all gases, liquids and solids are not the same. All are different in terms of their composition. This is the reason why the classification of the matter is very important.
Classification of Matter
Elements
Compounds
Mixtures
Here we are going to discuss two categories of the matter: Elements and Compounds
Elements And Compounds
What is a Compound?
When two or more elements chemically combine in a fixed ratio by mass, the obtained product is known as a compound. Compounds can be defined as substances consisting of 2 or more different types of elements in a fixed ratio of its atoms. When the elements combine, some individual property of the elements is lost and the newly formed compound has new properties.
Chemical Formula: Compounds are represented by their chemical formula. A chemical formula is a symbolic representation of the proportions of atoms that constitute a particular chemical compound.
The chemical formula of water is H2O which shows two atoms of hydrogen and one atom of oxygen have combined to form one molecule of H2O. The chemical formula for common salt is NaCl which shows one atom of sodium and one atom of chlorine combine to form one molecule of NaCl.
1. Types Of Compounds
Compounds can be classified into two types, molecular compounds and salts. In molecular compounds, the atom binds each other through covalent bonds. In salts, it is held together with ionic bonds. These are the two types of bonds out of which every compound is made of.
2. Example Of Compounds
Example of compounds includes water (H2O), Hydrogen Peroxide (H2O2), etc. You could see water’s chemical formula, it says it has 2 atoms of Hydrogen combined with 1 atom of oxygen and in hydrogen peroxide, it has 2 atoms of hydrogen and two atoms of oxygen.
Similarly, an example of salt would be the table salt (NaCl) which has 1 atom of sodium and one atom of chlorine.
Examples of some commonly used compounds and their molecular formula:
Compound Name Compound Formula
Alcohol C2H6O
Acetic Acid C2H4O2
Sulphuric Acid H2SO4
Ammonia NH3
Methane CH4
Nitrous oxide N2O
Salt NaCl