Solution Show Solution The symbol of an element is a short form used to represent individual elements or the atoms of the elements. Report Error Is there an error in this question or solution?
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New video tutorials information. If no numbers are present, it represents a single atom of an element. Explanation: A chemical symbol represents a single atom of an element: H a single hydrogen atom C a single carbon atom.
Related questions What periodic table elements are radioactive? How can the periodic table be used to predict the properties of the elements? How can elements have different isotopes? How can elements be broken down?
How can elements properties be predicted? What is a chemical element? In the typical periodic table, each element is listed by its element symbol and atomic number. Most elements are represented by the first letter or first two letters of their English name, but there are some exceptions. Two notable exceptions include silver and mercury.
The periodic table : The periodic table is a tabular display of all the chemical elements. The atoms are grouped in order of increasing atomic number. The element symbol is always almost accompanied by other information such as atomic number and atomic weight.
Atomic number describes the number of protons in one atom of that element. For example, an atom of oxygen contains 8 protons. Elements are listed in order of increasing atomic number from left to right. Each row of the periodic table is called a period and each column of the periodic table is called a group or family.
Some groups have specific names like the halogens or noble gases. Elements within the same period or group have similar properties. In addition, the total number of electron shells an atom determines which period it belongs to.
Because of its structure, the periodic table has become an extremely useful tool for assessing and predicting elemental and chemical trends. Chemistry 3. Molecules are electrically neutral compounds made of multiple atoms bound together by chemical bonds. An atom is defined as a basic unit of matter that contains a centralized dense nucleus surrounded by an electron cloud. When two or more atoms are held together by a chemical covalent bond, this new entity is known as a molecule.
Molecules are neutral and carry no charge; this property distinguishes them from polyatomic ions, such as nitrate NO 3 —. Molecular size varies depending on the number of atoms that make up the molecule. Most molecules are too small to be seen with the naked eye.
The smallest molecule is diatomic hydrogen H 2 , with a bond length of 0. Macromolecules are large molecules composed of smaller subunits; this term from biochemistry refers to nucleic acids, proteins, carbohydrates, and lipids. Some macromolecules may be observed by specialized microscopes. However, this empirical formula does not always describe the specific molecule in question, since it provides only the ratio of its elements.
The full elemental composition of a molecule can be precisely represented by its molecular formula, which indicates the exact number of atoms that are in the molecule. Isomers are molecules with the same atoms in different geometric arrangements. Because of these different arrangements, isomers often have very different chemical and physical properties.
In the picture below, 1-propanol is mostly used in the synthesis of other compounds and has a less offensive odor, whereas 2-propanol is the common household alcohol.
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