the atomic number of an element equals the number of
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Question Bank Topic 2 1 The number of protons in the nucleus of the atom is equal to the atomic number (Z). 2  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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Atomic Number and Mass Number The total number of protons and neutrons in the nucleus is called mass number of the atom. It is generally represented by the letter A. Mass Number (A) = Number of protons (Z) + Number of neutrons (N) = Number of nucleons. The number of protons in the nucleus is equal to atomic number, Z while the number of neutrons in the nucleus is sometimes called neutron number, N.
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Translations for atomic number Noun. 1. atomic number-the order of an element in Mendeleyev's table of the elements; equal to the number of protons in the nucleus or electrons in the neutral state of an atom of an element.
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an atom of cesium cs has 55 protons 55 electrons and 77 neutrons true false The atomic number tells you the number of. in one atom of an element. It also tells. you the number of in a neutral atom of that element. The atomic number gives the identity of. an element as well as it's location on the Periodic Table. No two different elements will have the. atomic number. The mass number is used to calculate the number of. calculate the number of neutrons you must subtract the #. in one atom of an elemen. from the.
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- In chemistry and physics, the atomic number of a chemical element (also known as its proton number) is the number of protons found in the nucleus of an atom of that element, and therefore identical to the charge number of the nucleus. It is conven...
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- The number of protons in the nucleus of an atom determines an element's atomic number. In other words, each element has a unique number that identifies how many protons are in one atom of that element. For example, all hydrogen atoms, and only hydrogen atoms, contain one proton and have an atomic number of 1. All carbon atoms, and only carbon atoms, contain six protons and have an atomic number of 6. Oxygen atoms contain 8 protons and have an atomic number of 8.
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What does Z in chemistry mean? In chemistry and physics, the atomic number of a chemical element (also known as its proton number) is the number of protons found in the nucleus of an atom of that element, and therefore identical to the charge number of the nucleus.
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Difference between Atomic Mass and Atomic Number In a neutral atom, the number of electrons present in an element’s nucleus is equal to the number of protons present, and consequently is equal to the element’s atomic number. Both the atomic number and atomic mass are closely related. This is because the atomic number of an element is part of its atomic mass. If the atomic number of an element is high, the atomic mass is also expected to be high. Video. Here is a video with more information about mass number and atomic number of an element:
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What one number identifies an element? Confidence votes 77.6K. The atomic number of an element is equal to the number of protons in the nucleus of that element; it will identify the element. The number of neutrons of a given element may be different as the element may have a number of isotopes.
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- It is conventionally represented by the symbol Z. The atomic number uniquely identifies a chemical element. In an uncharged atom, the atomic number is also equal to the number of electrons. The atomic number, Z, should not be confused with the mass number, A, which is the number of nucleons, the total number of protons and neutrons in the nucleus of an atom.
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Atomic number An explanation of the superscripts and subscripts seen in atomic number notation. Atomic number is the number of protons, and therefore also the total positive charge, in the atomic nucleus. The Rutherford–Bohr model of the hydrogen atom (Z = 1) or a hydrogen-like ion ().
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General Chemistry/Print version Atoms must have equal  number of protons and electrons. To find  the number of neutrons you must find is  something called the mass number. Unfortunately,  the mass number isn't listed on the Table of  Elements. To find the mass number, all you need to  do is round the atomic weight to the nearest whole  number.he number of electrons in an element can change. For a neutral atom (net charge of zero), the number of protons is exactly equal to the number of electrons. So the number of electrons is also the same as the atomic number. However, it is possible to remove electrons and not change the identity of an element.
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- The atomic number of an atom is the number of protons it contains. All the atoms of a particular element have the same atomic number (number of protons). The atoms of different elements have different numbers of protons. For example, all oxygen atoms have 8 protons and all sodium atoms have 11 protons. The mass number of an atom is the total number of protons and neutrons it contains. The mass number of an atom is never smaller than the atomic number. It can be the same, but is usually bigger. Full chemical symbols. You need to be able to calculate the number of each sub-atomic particle in an atom if you are given its atomic number and its mass number.
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The mass number of an element is equal to? Best Answer: A. total number of electrons in the nucleus.-----------no. B. total number of protons and neutrons in the nucleus.-----yes. C. less than twice the atomic number--------no. D. a constant number for the lighter elements--------no. Source(s): plays_poorly...
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- Atomic Number (Z) The atomic number is the number of protons in the nucleus of an atom. It is listed on the periodic table for each element. No two elements have the same atomic number (or the same number of protons), so the atomic number identifies the element.
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Chemestry Chpt 3 As the mass number of the isotopes of an element increses the number of protons Remain the same As the atomic number increases the number of electrons in an atom
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Introduction In a neutral atom, the number of electrons will equal the number of protons, so we can easily determine electron number from atomic number. In addition, the position of an element in the periodic table—its column, or group, and row, or period—provides useful information about how those electrons are arranged.
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- Because atomic mass is nearly equal to the mass number of the atom. Mass number is always a round number that is natural number. The prot…on code for fluorine atom is 9. Mass number is the total number of protons and neutrons. So for mass number 19, the number of neutrons will be 19 - 9 = 10.
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- Yes, each element consists of only one type of atom in terms of atomic number, which is the number of protons in the nucleus. However, atoms of the same element can differ in …mass number and are called isotopes. Mass number is the sum of protons and neutrons in the nucleus of an isotope.
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atomic number Scientists use the term atomic number to describe the number of protons in one atom of an element. For example, the atomic number of hydrogen is 1. If you've ever taken a chemistry class, you've seen a chart called the periodic table of elements.. It lists every chemical element and each element's atomic number. Just by looking at the table, you can see that the atomic number of oxygen is 8 — this means that there are eight protons in one atom of oxygen. In chemistry and physics, the atomic number is represented by the letter Z.
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CHEMISTRY I: ATOMS AND MOLECULES The atomic number is the number of protons an atom has. It is characteristic and unique for each element. The atomic mass (also referred to as the atomic weight) is the number of protons and neutrons in an atom.
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Atomic Mass The Atomic Mass Number or simply the Mass Number of an atom is defined as sum of the number of the protons and the number of neutrons in the nucleus of the atom. The number of protons in the nucleus is called atomic number (Z). The total number of protons and neutrons is called mass number (A).
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Moseley's Periodic Table Mendeleev's table needed one important modification before it became the modern periodic table – the use of atomic number to order the elements.All atoms of the same element contain the same number of particles called protons, and this is called the element's atomic number.endeleev put the elements in order of their relative atomic mass, and this gave him some problems. For example, iodine has a lower relative atomic mass than tellurium, so it should come before tellurium in Mendeleev's table.
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element An element is uniquely determined by the number of proton s in the nuclei of its atom s. The number of protons in the nucleus of the atom of an element is known as the atomic number of that element. The number of electron s in the atom of a specific element can vary. If the number of electrons is the same as the number of protons, then the atom has no electric charge. However, if the number of electrons is different from the number of protons, the atom is called an ion. If there are more electrons than protons, it is a negative ion; if there are fewer electrons than protons, it is a positive ion. The number of neutron s in the atom of a specific element can also vary.
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- The number of protons and electrons (in a neutral atom) are equal to the atomic number of the atom. For example in a, the number of protons and electrons in magnesium is 12.To find neutrons, you take the atomic mass of the atom and subtract the number of protons.For Magnesium, you subtract 12 from 25 to find the number of neutrons, which in this case is 13.he number of protons and electrons (in a neutral atom) are equal to the atomic number of the atom. For example in a, the number of protons and electrons in magnesium is 12.
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Atomic Number and Mass Number Therefore, atomic mass of magnesium is 12 u + 12 u = 24 u. Calculation of Number of Electrons, Protons and Neutrons. From the knowledge of atomic number and mass number of an element it is possible to calculate number of electrons, protons and neutrons in an atom of the element.