Define elements compounds and molecules
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Element:
The element is the fundamental substance that consists of only one type of atom. Elements consist of smaller particles and can be man-made or synthetic. Their arrangement in the periodic table is based on the number of protons in an increasing order. The atomic number of an element is indicated by Z. When atoms are arranged differently in an element having the same number of protons, you get different forms of an element. For example, both graphite and diamond are elements of carbon but they look very different from each other.
Compound:
The chemical formula of water is H2O.Observe that, water is made of two hydrogen atoms and one oxygen atom. Here, two different elements, hydrogen and oxygen combine, giving rise to a new substance called water. Such substances, which are made by the combination of two or more kinds of elements are called Compounds.The atoms in a compound are chemically bonded andhence cannot be separated easily.Similarly, the chemical formula of carbon dioxide is CO2 and it is made up of two elements, carbon and oxygen.Some other examples of compounds are table salt (NaCl), chalk(CaCO3)and water (H2O).
molecule:
Molecule is the smallest unit of a chemical compound and it exhibits the same chemical properties of that specific compound. As molecules are made up of atoms jointly held by chemical bonds, they can vary greatly in terms of complexity and size.The oxygen we breathe has a molecular formula O2. Should we consider this as an element or compound?When two or more atoms of the same element combine together, we call them Molecules. So, we call O2 as an oxygen molecule. In the same way, wefind hydrogen molecules H2, chlorine molecules Cl2 and others in nature.
The element is the fundamental substance that consists of only one type of atom. Elements consist of smaller particles and can be man-made or synthetic. Their arrangement in the periodic table is based on the number of protons in an increasing order. The atomic number of an element is indicated by Z. When atoms are arranged differently in an element having the same number of protons, you get different forms of an element. For example, both graphite and diamond are elements of carbon but they look very different from each other.
Compound:
The chemical formula of water is H2O.Observe that, water is made of two hydrogen atoms and one oxygen atom. Here, two different elements, hydrogen and oxygen combine, giving rise to a new substance called water. Such substances, which are made by the combination of two or more kinds of elements are called Compounds.The atoms in a compound are chemically bonded andhence cannot be separated easily.Similarly, the chemical formula of carbon dioxide is CO2 and it is made up of two elements, carbon and oxygen.Some other examples of compounds are table salt (NaCl), chalk(CaCO3)and water (H2O).
molecule:
Molecule is the smallest unit of a chemical compound and it exhibits the same chemical properties of that specific compound. As molecules are made up of atoms jointly held by chemical bonds, they can vary greatly in terms of complexity and size.The oxygen we breathe has a molecular formula O2. Should we consider this as an element or compound?When two or more atoms of the same element combine together, we call them Molecules. So, we call O2 as an oxygen molecule. In the same way, wefind hydrogen molecules H2, chlorine molecules Cl2 and others in nature.
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Element: one single atom. A mixture contains two or more substances (elements, lattices, molecules, compounds), that are not chemically bonded together.
Compound: two or more different atoms chemically bonded together.
Molecules. A group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.
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Compound: two or more different atoms chemically bonded together.
Molecules. A group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.
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