what is the number of protons and neutrons in an atom called?
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The total number of protons and neutrons in an atom is called its mass number. The proton number is shown below the chemical symbol, and the mass number is shown above. In this example the atomic number is 17 and the mass number is 35.
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The number of protons in an atom is called its atomic number (Z). This number is very important because it is unique for atoms of a given element. ... Therefore, the atomic number of an atom also tells you how many electrons the atom has. This, in turn, determines many of the atom's chemical properties.
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['number of protons = atomic number.', 'number of electrons = atomic number.', 'number of neutrons = mass number - atomic number.']
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Calculating numbers of subatomic particles To calculate the numbers of subatomic particles in an atom, use its atomic number and mass number: number of protons = atomic number. number of electrons = atomic number. number of neutrons = mass number - atomic number.
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Fundamental Subatomic Particles The number of electrons in a neutral atom is equal to the number of protons. The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in 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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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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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. What about the electrons? ... The mass is not counted in the atomic mass.
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Along with protons, they make up almost all of the mass of the atom. The number of neutrons is called the neutron number and can be found by subtracting the proton number from the atomic mass number.
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Mass number. The mass number of an atom is its total number of protons and neutrons. Atoms of different elements usually have different mass numbers , but they can be the same.
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The number of protons in an atom is called its atomic number. This number is very important because it is unique for atoms of a given element. All atoms of an element have the same number of protons, and every element has a different number of protons in its atoms.
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The number of protons in the nucleus of an atom is its atomic number (Z). This is the defining trait of an element: Its value determines the identity of the atom. For example, any atom that contains six protons is the element carbon and has the atomic number 6, regardless of how many neutrons or electrons it may have.
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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. atoms of different elements have different numbers of protons.
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Forms of the same atom that differ only in their number of neutrons are called isotopes. Together, the number of protons and the number of neutrons determine an element's mass number: mass number = protons + neutrons.
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The number of protons present in the nucleus of an atom is called atomic number. Mass number of an element is the number of protons and neutrons in an atom of the elments. Usually it is equal to the atomic weight of the elments converted to the nearest whole number.
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Answer Key The number of protons an atom has is called its atomic number, which decides what kind of atom it is. Changes in the number of neutrons make an isotope, and changes to the number of electrons make an ion. (A) They are made up of subatomic particles called protons, electrons and neutrons.
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The atomic number is the the number of protons an element contains. The mass number is the sum of protons and neutrons in the nucleus of an atom. Atomic weight/ mass and Mass number. The mass number is the sum of both neutrons and protons.