how many electrons are in an atom?
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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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So... for the element of ARGON, you already know that the atomic number tells you the number of electrons. That means there are 18 electrons in an argon atom. Looking at the picture, you can see there are two electrons in shell one, eight in shell two, and eight in shell three.
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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 Particles Atoms consist of three basic particles: protons, electrons, and neutrons. The nucleus (center) of the atom contains the protons (positively charged) and the neutrons (no charge). The outermost regions of the atom are called electron shells and contain the electrons (negatively charged).
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Electrons are the smallest of the three particles that make up atoms. Electrons are found in shells or orbitals that surround the nucleus of an atom. Protons and neutrons are found in the nucleus.
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So... for the element of SILICON, you already know that the atomic number tells you the number of electrons. That means there are 14 electrons in a silicon atom. Looking at the picture, you can see there are two electrons in shell one, eight in shell two, and four in shell three.
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there are 15 electrons in total, there must be 5 electrons at the third energy level. there are 3 energy levels, so the electrons at the third are outer, or valence, electrons. this means that there are 5 valence electrons. all neutral atoms of the elements in group 5 have 5 valence electrons.
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How many electrons in an atom may have the following quantum numbers? (a) n = 4, (b) n = 3, l = 0. b) When n= 3, l=0 means 3s orbital which can have 2 electrons .
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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.
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The neutral Carbon atom has 6 electrons. The atomic number is 6 since there are 6 protons. Here, a "neutral atom" is simply an atom that has no charge. See, an atom consists of protons, neutrons, and electrons.
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So... for the element of BERYLLIUM, you already know that the atomic number tells you the number of electrons. That means there are 4 electrons in a beryllium atom. Looking at the picture, you can see there are two electrons in shell one and two in shell two.
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That means there are 13 electrons in a aluminum atom. Looking at the picture, you can see there are two electrons in shell one, eight in shell two, and three in shell three.
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Most atoms do not have eight electrons in their valence electron shell. Some atoms have only a few electrons in their outer shell, while some atoms lack only one or two electrons to have an octet.
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Electron "cloud" of orbitals Difference of number of electrons from number of protons defines the charge on an atom. For example, among atoms of iron, all with 26 protons, Fe2+ has 24 electrons and Fe3+ has 23 electrons, whereas elemental (uncharged) Fe has 26 electrons. the mass of an atom is outside the nucleus.
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A Carbon atom contains 6 electrons. A Hydrogen atom contains 1 electron. Since there are four of them here, there'll also be four electrons. Therefore, each molecule of CH4 contains 10 electrons.
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Electron "cloud" of orbitals For example, among atoms of iron, all with 26 protons, Fe2+ has 24 electrons and Fe3+ has 23 electrons, whereas elemental (uncharged) Fe has 26 electrons. the mass of an atom is outside the nucleus.
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An atom is an element. The two words are synonymous, so if you're looking for the number of atoms in an element, the answer is always one, and only one.