When two or more different atoms or molecules are together but not covalently bonded, i.e mixture. It could be a molecule or a group of identical molecules held together. So, A group of atoms held together by chemical bonds is molecules.Ĭompound is the bonding of two or more different atoms bonded together. When there is sharing of electrons between two atoms, they are bonded together by that sharing. It could be done by electrons in two ways. The formation of a molecule happens when atoms come together because of their electrons. A molecule that is formed with two or more atoms of a single element is homonuclear. Many elements are non-metal and exist only as molecules in the environment like hydrogen, it only exists as a hydrogen molecule. Molecules could either be linked together by a covalent bond or an ionic bond. Now, let’s understand how atoms are joined together. The actual number of atoms that are present in a molecule is shown by it. The atoms may be arranged as either molecules or. Molecular compounds are the compounds that exist as molecules. A compound is a substance containing atoms of two or more elements joined together by chemical bonds. They contain a fixed ratio of atoms, held together by chemical bonds. Molecules are also the cluster of atoms that are linked together by covalent bonds. A compound is a pure chemical substance made of two or more different chemical elements. The water molecule, which is formed when an oxygen molecule fills. When this sharing happens in pairs, the bond is called a covalent bond, and it can be very strong. The compound water is formed when one oxygen atom and two hydrogen atoms combine. Covalent Bonding: An atom with one, two, three or four extra electrons in its outer shell, or one missing one, two or three electrons, seeks to share electrons to achieve stability.
Every compound is a molecule but not every molecule is a compound. Atoms from different elements can combine. The combination of atoms that are of two or different elements forms a compound. Molecules are made when two or more atoms chemically bond together. When two or more atoms are joined together chemically then a molecule is formed. Atoms form every solid, liquid, gas, etc. It has components: Electrons and nucleus (protons+neutrons). The smallest unit of any matter that bonds and forms an element is an atom. Therefore, a combination of two or more elements chemically combined is a compound.Hint: Before answering this question, we should first know about an atom. In a compound, the ratio of component atoms remains the same. These bonds form as a result of the sharing or exchange of electrons. The compound water is formed when one oxygen atom and two hydrogen atoms combine. When atoms join together to form molecules, they are held together by chemical bonds. The combination of atoms that are of two or different elements forms a compound. Compounds can be broken down into simpler substances by chemical means but cannot be broken by physical means. When two or more atoms are joined together chemically then a molecule is formed. The properties of resultant compounds are different from those of the properties of elements from which they are formed. A compound consists of atoms of two or more different elements. Note: A molecule can have two or more atoms of the same element or different elements. Therefore, a combination of two or more elements chemically combined is called a compound.
Examples include water $H_2O$ and table salt $NaCl$. If the pure substance is a compound substance, then it is a compound. If the pure substance is an elemental substance, then it is an element. Mixtures can be separated into their components by physical means whereas pure substances cannot be separated into their components by any physical means. Matter consists of mixtures and also pure substances. Atoms have the same number of protons and electrons. Molecules can contain any number of atoms. Two or more elements combine in definite proportions chemically to form compounds.Įlements are the simplest form of matter whereas molecules are the simplest form of matter which can have an independent existence. One of the simplest is called methane, in which there are always four times as many hydrogen atoms as carbon atoms. The elements carbon and hydrogen combine to form many different compounds. They cannot be broken by any physical or chemical means. A compound is a substance that contains two or more elements chemically combined in a fixed proportion. Elements are considered as the simplest form of matter. Hint: In any chemical reaction, atoms are the smallest particles.
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