what is atomic number and how is it used?
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The atomic number uniquely identifies a chemical element. It is identical to the charge number of the nucleus. In an uncharged atom, the atomic number is also equal to the number of electrons. The sum of the atomic number Z and the number of neutrons N gives the mass number A of an atom.
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The atomic numbers are listed along with the names and symbols of the elements on the inside cover of the text. The atomic number equals the charge on the nucleus. It therefore also equals the number of protons in the nucleus and also equals numerically the number of electrons in the neutral atom.
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Elements are placed in order on the periodic table based on their atomic number, how many protons they have. In a neutral atom, the number of electrons will equal the number of protons, so we can easily determine electron number from atomic number.
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The atomic number (number at the top) is the amount of protons and the amount of electrons. So if an element has an atomic number of 5, you know that it has 5 protons and 5 electrons. The atomic mass (number at the bottom) is the amount of protons and neutrons added together.
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The atomic number is the amount of protons present in the atom. Because of that, we can say that the atomic number represents the positive charge of the atom. As the positive charge of the atom increases the atomic radius decreases because the positive charge will bring electrons closer to the nucleus.
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We are shown that the atomic number is the number of protons in an atom. We see that the mass number minus the atomic number is the number of neutrons. We complete the atomic structure by explaining that atoms have the same number of protons and electrons.
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Atomic number is the number of protons, and therefore also the total positive charge, in the atomic nucleus.
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An atomic number is the number of protons in a nucleus. The number of protons in a nucleus is a factor that introduces instability. All the elements beyond those found in nature were synthesized.
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The atomic number of an atom is the number of protons (and usually, the number of electrons) in the atom. The atomic mass of an atom is the total number of protons and neu- trons in the nucleus of the atom.
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The mass number tells us the number (the sum of nucleons) of protons and neutrons in the nucleus of an atom. The atomic number (also known as the proton number) is the number of protons found in the nucleus of an atom. It is traditionally represented by the symbol Z.
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The atomic number is the number of protons in an element, while the mass number is the number of protons plus the number of neutrons.
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The atomic number stands for the number of protons in an atom of the element. The number of protons determines the identity of the element, So the atomic number identifies the element.
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Number of protons in the nucleus of an atom. Atomic number also specifies a number of electrons, which is equal to a number of protons. Atomic numbers are equivalent to element numbers in periodic table. An atom or a molecule that lost or gained one or more electrons, and thus has an electric charge.
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Atomic number. The number of protons in an atom of an element is its atomic number . Remember that: all atoms of a given element have the same number of protons.
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The atomic number or proton number (symbol Z) of a chemical element is the number of protons found in the nucleus of every atom of that element. The atomic number uniquely identifies a chemical element. ... The sum of the atomic number Z and the number of neutrons N gives the mass number A of an atom.
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1. The atomic number defines the identity of an element. 2. In an electrically neutral atom, the number of protons equals the number of electrons.
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Atomic number is the number of protons as well as the number of proton is equal to the number of electrons even the carbon atom has 6 electrons.