what number identifies an element
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- The atomic number of an element is unique to that element. The atomic number is equal to the amount of electrons in one atom of that element. As each element categorically has … it's own amount of electrons, you can identify an element from this number.
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What is an Atom? The number of protons in an atom defines what element it is. For example, carbon atoms have six protons, hydrogen atoms have one and oxygen atoms have eight. The number of protons in an atom is referred to as the atomic number of that element. The number of protons in an atom also determines the chemical behavior of the element. The Periodic Table of the Elements arranges elements in order of increasing atomic number. Three quarks make up each proton — two up quarks (each with a 2/3 positive charge) and one down quark (with a 1/3 negative charge) — and they are held together by other subatomic particles called gluons, which are massless.
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- The atomic number is the number that indicates the number of protons (or electrons) of an element. The atomic mass is on account of the mass of proton and nutron of an atom. The mass of nutron , proton and electrons are 1.67493*10^-(27) 1.67262*10^(-27) kg and 9.10939*10^(-31) kg. The mass of the electron is negligible compared to that of nutron anor proton. The nutron is slightly more mass than that of proton.
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What does an atomic number represent? The atomic number represents or stands for the distinct identity of a chemical element. It is usually defined as the number or protons present in an atom of an element, which is also equal to the number of electrons.
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Iodine Iodine is a chemical element. Its atomic number (which is the number of protons in it) is 53, and its atomic mass (the number of protons plus neutrons) is 127. It is part of the Group 7 (halogens) on the periodic table of elements and its electronic configuration is 2,8,18,18,7. It is a nonmetal.
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High School Chemistry/Atomic Terminology This specific number was called the element's atomic number. Of course, since neutral atoms have to have one electron for every proton, an element's atomic number also tells you how many electrons are in a neutral atom of that element.
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Periodic Table of Elements The periodic table contains an enormous amount of important information: Atomic Number: The number of protons in an atom defines what element it is. For example, carbon atoms have six protons, hydrogen atoms have one, and oxygen atoms have eight.he periodic table contains an enormous amount of important information: Atomic Number: The number of protons in an atom defines what element it is. For example, carbon atoms have six protons, hydrogen atoms have one, and oxygen atoms have eight.
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Atom The number of protons in the nucleus defines to what chemical element the atom belongs: for example, all copper atoms contain 29 protons. The number of neutrons defines the isotope of the element. The number of electrons influences the magnetic properties of an atom.Atoms can attach to one or more other atoms by chemical bonds to form chemical compounds such as molecules.he number of neutrons defines the isotope of the element. The number of electrons influences the magnetic properties of an atom. Atoms can attach to one or more other atoms by chemical bonds to form chemical compounds such as molecules.
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Nickel Nickel (chemical symbol Ni) is a chemical element. It has an atomic number of 28 and an atomic mass of about 58.69amu. It has 28 protons. It is a transition metal.
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element (See Appendix 6 for a list of the elements, and the symbol, atomic weight, and atomic number of each.) The atomic number of an element is determined by the number of protons in the nucleus of one of its atoms.able 6 lists the elements, and the symbol, atomic weight and atomic number of each. The atomic number of an element is determined by the number of protons in the nucleus of an atom of the element.
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MADMAN BIOLOGY • Chemical elements are distinguished by the nature of their atom—every atom consists of a nucleus, composed of protons and neutrons, surrounded by a cloud of electrons. The number of protons in the nucleus (called the atomic number) is unique for each element and largely determines the chemical behavior of the element. Plutonium has 94 protons in its nucleus, so it is given the atomic number 94. (There are currently 118 known elements, from hydrogen to ununoctium.) • Plutonium can be found naturally in extremely small traces, but it was discovered in 1940 by researchers
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- Relevance. Rating Newest Oldest. Best Answer: The number or protons is what defines an atom and distinguishes it from any other element. All atoms of the same element has the same number of protons but may vary in its number of neutrons (isotopes of the element) or number of electrons (its valance state). Source(s): dougger · 8 years ago. Thumbs up.
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Chemistry A chemical element is a pure substance which is composed of a single type of atom, characterized by its particular number of protons in the nuclei of its atoms, known as the atomic number and represented by the symbol Z. The mass number is the sum of the number of protons and neutrons in a nucleus.
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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.xygen atoms contain 8 protons and have an atomic number of 8. The atomic number of an element never changes, meaning that the number of protons in the nucleus of every atom in an element is always the same.
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Which subatomic particle identifies an atom as that of a particular element? Asker's rating. The number of protons determines the atom's atomic number (and thus element identity). The number of protons plus neturons determines atom's mass. The number of neutrons determines the isotope of an element for a given number of protons. The number of protons minus the number of electrons determines the ionic charge.
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Introduction Atomic number, atomic mass, and relative atomic mass. Atoms of each element contain a characteristic number of protons. In fact, the number of protons determines what atom we are looking at (e.g., all atoms with six protons are carbon atoms); the number of protons in an atom is called the atomic number. In contrast, the number of neutrons for a given element can vary.
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Translations for atomic number 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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- The atomic number on the periodic table (or anywhere else) tells  you which element is being specified. The atomic number of an atom  is the number of protons in the nucleus … of that atom, and it is the  elemental identity of that atom. Only the number of protons  identifies an element.
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Elements and Atoms: The Building Blocks of Matter Let's combine Hund's Rule and the Aufbau Principle by looking at the electron configuration for two very common elements. Nitrogen has an atomic number of 7, and thus has 7 protons and electrons. Next to it on the periodic table is oxygen with an atomic number of 8, and thus 8 protons and electrons.
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What Does the Atomic Number of an Atom Identify? The three main atomic particles are protons, neutrons and electrons. The atomic number of an atom identifies the number of protons in the atom. This is the defining characteristic of an element. An atom can gain or lose neutrons or electrons while retaining its elemental identity. If the number of protons in an atom changes, however, the atom becomes a different element.
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Chemistry chapter 2 ATOMIC NUMBER AND MASS NUMBERS. After reading this section you will be able to do the following: Define and determine the atomic number of an atom. Define and determine the mass number of an atom. What is an atom's atomic number? 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. The atomic number of an element never changes, meaning that the number of protons in the nucleus of every atom in an element is always the same.
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Chemical element The mass number of an element, A, is the number of nucleons (protons and neutrons) in the atomic nucleus. Different isotopes of a given element are distinguished by their mass numbers, which are conventionally written as a superscript on the left hand side of the atomic symbol (e.g., 238 U).he standard state, also known as reference state, of an element is defined as its thermodynamically most stable state at 1 bar at a given temperature (typically at 298.15 K). In thermochemistry, an element is defined to have an enthalpy of formation of zero in its standard state.
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Chemistry A chemical element is a pure substance which is composed of a single type of atom, characterized by its particular number of protons in the nuclei of its atoms, known as the atomic number and represented by the symbol Z. The mass number is the sum of the number of protons and neutrons in a nucleus. Although all the nuclei of all atoms belonging to one element will have the same atomic number, they may not necessarily have the same mass number; atoms of an element which have different mass numbers are known as isotopes.
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Group Numbers The group number is an identifier used to describe the column of the standard periodic table in which the element appears. Groups 1-2 (except hydrogen) and 13-18 are termed main group elements. Groups 3-11 are termed transition elements.
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What Is the Smallest Part of an Element? The atomic number indicates the number of protons present in the nucleus of an atom, which is used to uniquely identify the atom, as well as its chemical properties. The atomic number is denoted by the universal symbol Z..
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How many more chemical elements are there for us to find? Each element is assigned a number: for instance, carbon is number 6. These numbers are not arbitrary labels, but have a fundamental significance. They specify how many protons, a kind of elementary particle, the atom contains.