what types of atoms are in the human body?
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The four most abundant elements in the human body – hydrogen, oxygen, carbon and nitrogen – account for more than 99 per cent of the atoms inside you.
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Elements are atoms all of the same atomic number, i.e. all atoms of an element have the same number of protons in their nucleus. Substances can be elements but they can also be molecules. ... Substances, loosely defined as the word is, could also be compounds, which can include different kinds of molecules.
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Atoms are composed of three main subatomic particles: protons, neutrons, and electrons. Protons and neutrons are grouped together in the nucleus of an atom, while electrons orbit about the nucleus.
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But physicists now know that atoms are not solid little balls. It's better to think of them as tiny electrical, “planetary” systems. They're typically made up of three main parts: protons, neutrons and electrons. Think of the protons and neutrons as together forming a “sun”, or nucleus, at the centre of the system.
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In summary, for a typical human of 70 kg, there are almost 7*1027 atoms (that's a 7 followed by 27 zeros!) Another way of saying this is "seven billion billion billion." Of this, almost 2/3 is hydrogen, 1/4 is oxygen, and about 1/10 is carbon. These three atoms add up to 99% of the total!
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There are more than 109 different types of atom - one for each element. Differences between the atoms give the elements their different chemical properties. In 2001, there were 115 known elements. However, those above 109 are highly unstable and have been made in only tiny quantities.
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The structure of the atom. An atom is the smallest unit of matter that retains all of the chemical properties of an element. ... Most atoms contain all three of these types of subatomic particles—protons, electrons, and neutrons.
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Scientists estimate the average cell contains 100 trillion atoms. The number of atoms per cell is about the same as the number of cells in the body.
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An element (also called a "chemical element") is a substance made up entirely of atoms having the same atomic number; that is, all of the atoms have the same number of protons. Hydrogen, helium, oxygen, nitrogen, carbon, gold, silver, lead, and uranium are well-known examples of elements.
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Most biomolecules are organic compounds, and just four elements—oxygen, carbon, hydrogen, and nitrogen—make up 96% of the human body's mass.
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But, atoms themselves contain many subatomic particles, the three most important of which are protons, neutrons, and electrons. These particles do not vary in quality from one element to another; rather, what gives an element its distinctive identification is the quantity of its protons, called its atomic number.
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What Is an Atom? Atoms consist of a nucleus made of protons and neutrons orbited by electrons. Atoms are the basic units of matter and the defining structure of elements.
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In the middle of every atom is the nucleus. The nucleus contains two types of subatomic particles, protons and neutrons. The protons have a positive electrical charge and the neutrons have no electrical charge.
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Atoms. An atom is the smallest unit of a pure substance or element that can exist and still retain the properties of the original substance or element. Key concepts: common substances, such as air, water, wood and cloth are mixtures of materials and can be chemically or physically broken down into simpler substances.
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An atom is the smallest particle of matter and is made of protons, neutrons, and electrons. Molecules are made of two or more atoms combined together. An element is a substance made of only one type of atom, and three examples of elements are carbon, oxygen, and gold.
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The number of atoms per human cell is only a rough estimate because cells come in different sizes. Scientists estimate the average cell contains 100 trillion atoms. The number of atoms per cell is about the same as the number of cells in the body.
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There are more than 109 different types of atom - one for each element. Differences between the atoms give the elements their different chemical properties . Till now there are 118 known elements. However, those above 109 are highly unstable and have been made in only tiny quantities.