atomic-structure-worksheet-info mass number proton neutrons isotope ion - ATOMIC STRUCTURE WORKSHEET NAME Atoms are composed of three sub-atomic

Atomic-structure-worksheet-info mass number proton neutrons isotope ion

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ATOMIC STRUCTURE WORKSHEET NAME __________________________________ Atoms are composed of three sub-atomic particles: the proton, the neutron, and the electron. The proton and the neutron are found in the nucleus. Electrons are found in a cloud surrounding the nucleus. The atomic number of an element is equal to the number of protons in that element. If the atom is neutral , the number of electrons (-) is equal to the number of protons (+). If the atom carries a charge , it is referred to as an ion . The charge on an ion indicates an imbalance between protons and electrons. If the ion has a positive charge, there are more protons than electrons. To find the number of electrons, you must subtract the charge from the atomic number. If the ion has a negative charge , there are more electrons than protons. To find the number of electrons, you must add the charge to the atomic number. The mass number is a whole number equal to the number of protons plus neutrons. This is because we say that protons and neutrons each have a mass of 1 amu (standardized from Carbon-12). This number is not on
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