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An Element is a part or aspect of something abstract, especially one that is essential or characteristic
Chemical elements are the basic building blocks of matter. Elements are referred to by name and by their symbols, to make it easier to write chemical structures and equations.
1 - H - Hydrogen 2 - He - Helium 3 - Li - Lithium 4 - Be - Beryllium 5 - B - Boron 6 - C - Carbon 7 - N – Nitrogen
Those are 7 basic elements of the periodic table but there are 118 in total .
A pure substance is a sample of matter with both definite and constant composition with distinct chemical properties
Examples of pure substances include elements and compounds. Alloys and other solutions may also be considered pure.
Those are all examples of Pure Substances .
the basic unit of a chemical element.
Atoms are fundamental units of matter that cannot be broken down
http://chemistry.about.com/od/chemistryglossary/g/Chemical-Energy-Definition.htmusing any chemical means. Here are some examples of atoms.
a calcium ion, Ca
Those are all basic atoms that we use and live with in everyday life .
The central and most important part of an object, movement, or group, forming the basis for its activity and growth
The nucleus is the center core of an atom that has a positive charge and that contains most of the atom's mass, or the central heart of an organization or group .
A stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of opposite sign .
A stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids
An elementary particle that orbits the nucleus of an atom. There is one electron for every proton in the nucleus, which keeps the atom "electrically neutral," as considered to have a negative charge and protons a positive charge .
A subatomic particle of about the same mass as a proton but without an electric charge, present in all atomic nuclei except those of ordinary hydrogen .
The pulses are from a beam of light produced by the intense magnetic field which, sweeps across Earth as the neutron star rotates.
Atomic mass unit (amu)
the mass of an atom of a chemical element expressed in atomic mass units. It is approximately equivalent to the number of protons and neutrons in the atom (the mass number) or to the average number allowing for the relative abundances of different isotopes.
The atomic masses of most of the elements are not whole numbers. For example carbons atomic number is 12.0107 , most people wonder how because carbon can’t contain a fraction of protons or neutrons .
The number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table .
The average mass of an atom, taking into account all its naturally occurring isotopes.
The number of protons in an atom.
the total number of protons and neutrons in a nucleus
The total number of protons and neutrons in the nucleus of an atom. For example , nitrogen has 7 protons and 7 neutrons in its nucleus, giving it a mass number of 14. Isotopes of elements are distinguished by their mass number for example carbon-12 and carbon-14 have mass number of 12 and 14 respectively.
A table of the chemical elements arranged in order of atomic number, usually in rows, so that elements with similar atomic structure (and hence similar chemical properties) appear in vertical columns.
The Periodic Table Chart provides details of all the known chemical elements arranged in rows and columns that provides information about their properties. The rows in the Periodic Table chart are in order of atomic number (which reflects the number of protons in the nucleus of an atom).The higher the atomic number, the greater the number of protons in the nucleus.
A period is the name given to a horizontal row of the periodic table. The periodic table has seven periods. Period 1 contains only two elements: hydrogen and helium.
The periodic table has a total of 7 periods , period 1 only contains 2 elements hydrogen and helium , period 6 contains 32 elements .
Group in an experiment or study that does not receive treatment by the researchers and is then used as a benchmark to measure how the other tested subjects do. total .
The Periodic Table Chart provides details of all the known chemical elements arranged in rows and columns that provides information about their properties. The rows in the Periodic Table chart are in order of atomic number (which reflects the number of protons in the nucleus of an atom).The higher the atomic number, the greater the number of protons in the nucleus