is the number of protons and electrons the same in an atom?
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Atoms do not always contain the same number of electrons and protons, although this state is common. When an atom has an equal number of electrons and protons, it has an equal number of negative electric charges (the electrons) and positive electric charges (the protons).
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The atomic number is the number of protons in an atom of an element. ... Atoms must have equal numbers of protons and electrons. In our example, an atom of krypton must contain 36 electrons since it contains 36 protons. Electrons are arranged around atoms in a special way.
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Atomic number. 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.
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The number of protons, neutrons, and electrons in an atom can be determined from a set of simple rules. The number of protons in the nucleus of the atom is equal to the atomic number (Z). ... The number of neutrons is equal to the difference between the mass number of the atom (M) and the atomic number (Z).
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Atoms of the same element always have the same number of protons ( is it had a different number of protons it would be a different element). However atoms of the same element can have different numbers of neutrons (this gives them a different mass number). Different versions of the same element are called isotopes.
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An atom contains equal numbers of protons and electrons . Since protons and electrons have equal and opposite charges, this means that atoms are have no overall electrical charge. For example, the atomic number of sodium is 11. Every sodium atom has 11 protons and 11 electrons.
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Only if the number of protons (and consequently the electrons) is different, the atoms are of two different elements. The number of neutrons in atoms of different elements can be the same and so can the number of neutrons in two atoms of the same element be different.
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A particular atom will have the same number of protons and electrons and most atoms have at least as many neutrons as protons. ... All isotopes of a particular element have the same number of protons, but can have different numbers of neutrons.
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Identical Protons, Different Elements All protons are identical. ... In fact, atoms of any given element have a unique number of protons that is different from the numbers of protons of all other elements. For example, a hydrogen atom has just one proton, whereas a helium atom has two protons.
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The two particles in the atom that are equal in number are the protons and electrons. The protons are located in the nucleus along with neutrons.
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Atomic Number and Mass Number. ... Thus, the atomic number, which is the number of protons in the nucleus of the atom, identifies the element. Because an atom usually has the same number of electrons as protons, the atomic number identifies the usual number of electrons as well.
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Protons and Neutrons All protons are identical to each other, and all neutrons are identical to each other. Protons have a positive electrical charge, so they are often represented with the mark of a "+" sign.
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The number of protons in the nucleus of an atom is known as the atomic number, Z. It is the same as the number of electrons around the nucleus of the electrically-neutral atom. The mass number of an atom is equal to the total number of protons and neutrons.
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Atoms always have an equal number of protons and electrons, and the number of protons and neutrons is usually the same as well. Adding a proton to an atom makes a new element, while adding a neutron makes an isotope, or heavier version, of that atom.
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The atoms of different elements have different numbers of electrons, protons, and neutrons. Every element is unique and has an atomic number. That number tells you the number of protons in every atom of the element. The atomic number is also called the proton number.
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Two atoms of the same element can have different numbers of protons. ... Two different elements can have the same atomic number. Mass number. The sum of the protons and neutrons in the nucleus of that atom.
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The element of an atom is decided by the number of protons (which is the same as the number of electrons) in the atom. ... Atoms of the same element can differ in their mass which is the case if the number of neutrons in the atoms is not the same. These atoms with different mass are called isotopes.