what does the major portion of an atom's mass consists of
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What Are The Parts Of An Atom? Atomic Mass: The majority of an atoms’ mass comes from the protons and neutrons that make up its nucleus. Electrons are the least massive of an atom’s constituent particles, with a mass of 9.11 x 10-31 kg and a size too small to be measured by current techniques.
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- Asker's rating. Report Abuse. Atomic mass of an atom is the sum of the number of protons and neutrons present in the nucleus, expressed in atomic mass units. The mass of one proton and one neutron is roughly equal, and one atomic mass unit is defined as the mass of 1/12 th of a carbon atom (isotope : C.. g · 6 years ago.
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What Are The Parts Of An Atom? Along with protons, neutrons make up the nucleus, held together by the strong force. The neutron is a baryon and is considered to be composed of two down quarks and one up quark.
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Atom The actual mass of an atom at rest is often expressed using the unified atomic mass unit (u), also called dalton (Da). This unit is defined as a twelfth of the mass of a free neutral atom of carbon-12, which is approximately 6973166000000000000♠1.66×10−27 kg.
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Question: Learning Goal: To determine the number of protons, neutrons, and electrons in a given isotope or ... Since protons and neutrons make up most of the mass of an atom, the sum of the protons and neutrons is its mass number (A). In neutral atoms, the numbers of protons and electrons are equal. In ions, the numbers of electrons and protons are not equal.
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The major portion of an atom's mass consists of...? For anything else than hydrogen the correct answer is (4): neurtrons and protons. For Hydrogen-1 answer (1) is correct, as Hydrogen-1 does not contain any neutrons. For many atoms neutrons make up a major portion of the atom's mass. Therefore, answer 2 is correct for many atoms, too. Nobody · 9 years ago.
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- Albert Einstein had an IQ level in the range of 160-190. This man needs no intro....the master of chess. This man is an engineer, mathematician and geologist who used the Connection Machine supercomputer to analyze petroleum fields.
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Elementary particle The three main types of particles that make up all atoms are: 1  protons - have an electric charge of +1 and an atomic mass of 1. 2  electrons - have an electric charge of -1 and an effective atomic mass of 0. 3  neutrons- have an electric charge of 0 (neutral) and an atomic mass of 1.
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Atomic mass An atomic mass (symbol: m a) is the mass of a single atom of a chemical element. It includes the masses of the 3 subatomic particles that make up an atom: protons, neutrons and electrons. Atomic mass can be expressed in grams. However, because individual atoms have very small masses, this is not very helpful. Instead, atomic mass is expressed in unified atomic mass units (unit symbol: u). 1 atomic mass unit is defined as 1/12 of the mass of a single carbon-12 atom.
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Abundance of the chemical elements Although hydrogen and helium make up respectively ≈ 92 and ≈ 7% of the baryonic matter in the universe, the other elements i.e. the remaining 1% is huge masses that have led to the emergence life. The abundance of elements decreases exponentially with the atomic number (Z).
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Chemistry imagination illustration of the concentration of almost all the mass of an atom in the nucleus: If a coin the same size as a copper penny contained copper nuclei (copper atoms stripped of their electrons) rather than copper atoms (which are mostly empty space), the coin would weigh 190,000,000 tons.
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nucleus Subatomic particles. Structure of the atom. Each atom consists of a nucleus [nucleus: The central part of an atom. It contains protons and neutrons, and has most of the mass of the atom.
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Atom The nucleus contains protons, each of which has a charge of +1, and neutrons, which are uncharged. For a pure element, the number of protons and electrons are equal. All atoms of an element contain the same number of protons (and electrons). Different isotopes of an element contain different numbers of neutrons.The atomic weight of an isotope is the sum of the numbers of protons and neutrons and is denoted as a left superscript.The naturally occurring isotopes of N are 14 N (7 protons and 7 neutrons) and 15 N (7 protons and 8 neutrons) (Cotton and Wilkinson 1972).The atomic weight of an element is a weighted average of the atomic weights of the naturally occurring isotopes of the element.he nucleus contains protons, each of which has a charge of +1, and neutrons, which are uncharged. For a pure element, the number of protons and electrons are equal. All atoms of an element contain the same number of protons (and electrons). Different isotopes of an element contain different numbers of neutrons.
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- The elemental composition of the human body can be looked at from the point of view of either mass composition, or atomic composition. To illustrate both views, the adult male human body is approximately 57% water, and water is 11% hydrogen by mass but 67% by count of atoms (i.e. 67 atomic percent).Thus, most of the mass of the human body is oxygen, but most of the atoms in the human body are hydrogen atoms.n fact, 90% of the cells in (or on) a human body are microbes, by number (much less by mass or volume).
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Why atomic mass is not whole numbers? Atomic mass is approximately the sum of the number of protons andneutrons found in the nucleus of an atom. Basically atomic mass isthe weight of the neutrons and protons in on … e atom. For elements with no stable isotopes, the mass number of theisotope with the longest half-life is considered the atomic mass ofthe element.
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- Atoms and Elements. Ordinary matter is made up of protons, neutrons, and electrons and is composed of atoms. An atom consists of a tiny nucleus made up of protons and neutrons, on the order of 20,000 times smaller than the size of the atom. The outer part of the atom consists of a number of electrons equal to the number of protons, making the normal atom electrically neutral. A chemical element consists of those atoms with a specific number of protons in the nucleus; this number is called the atomic number. The atoms of an element may differ in the number of neutrons; atoms with different neutron numbers are said to be different isotopes of the element.
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- So, since the nucleus contains both neutrons and protons, an … d the number of electrons is equal to the number of protons; for a reasonable massy atom, the mass of the electrons will be roughly 1/(2 x 1836) of the atom.e know that the nucleus of an atom contains the nucleons, the protons and neutrons that make up that atom. This is almost all the mass of the atom, and these protons and neutrons are bound very tightly.
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- Pie charts of typical human body composition by percent of mass, and by percent of atomic composition (atomic percent). Almost 99% of the mass of the human body is made up of six elements: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus. Only about 0.85% is composed of another five elements: potassium, sulfur, sodium, chlorine, and magnesium. All 11 are necessary for life.
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Chemical element The relative atomic mass (historically and commonly also called atomic weight) of an element is the average of the atomic masses of all the chemical element's isotopes as found in a particular environment, weighted by isotopic abundance, relative to the atomic mass unit (u).or example, all carbon atoms contain 6 protons in their atomic nucleus; so the atomic number of carbon is 6. Carbon atoms may have different numbers of neutrons; atoms of the same element having different numbers of neutrons are known as isotopes of the element.
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What Four Elements Make Up Almost 90% of the Earth? The mantle is composed of iron-magnesium silicates, and the crust is composed of roughly 5 percent iron. All together, iron makes up an estimated 35 percent of the Earth's mass. Oxygen. Oxygen, the second most abundant element on Earth, is found mainly in the crust.
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General Biology/Print version All matter consists of atoms. The primary particles involved are electrons, which are charged negatively; protons th … at are positively charged, and neutrons; they have no charge.
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How Much Does Hernia Surgery for Dogs Cost? How much is it? On average, this type of surgery can cost anywhere from $400 to $2,000. The size of the dog, the age, as well as the severity of the condition, can greatly affect the price. The surgery can be as little as $250 to $400 if the procedure is done with a spay or neutering during the puppy stages.
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Elements in the Human Body and What They Do 99% of the mass of the human body is made up of only six elements: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus. Every organic molecule contains carbon. Since 65-90% of each body cell consists of water (by weight), it isn't surprising that oxygen and hydrogen are major components of the body.
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Where is most of an atom's mass located? Nearly all of an atom's mass is located in its nucleus, which holds an atom's heaviest particles, protons and&nbsp;neutrons&nbsp; The electrons in its Electron Cloud have nearly no mass so they are not counted..
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How is atomic mass determined? It is the weight of 1 mole of a substance in grams. Every periodic table has the atomic mass under the name of the element. Atomic mass is determined by adding together the masses of the protons and the neutrons within a single atom of a given element. The weight of the electrons is usually not counted as it is so small that the mass is negligible, however on more detailled periodic tables the weight is sometimes included.