Oxygen as 2 core electrons and 6 valence electrons.
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Cadmium (Cd) has 48 electrons, and its electron configuration is [Kr] 4d10 5s2. This means that the core electrons in cadmium are those in the inner shells, which are the 36 electrons from the noble gas krypton (Kr). Therefore, cadmium has 36 core electrons.
Germanium has 36 core electrons. Core electrons are the inner electrons that are not involved in chemical bonding.
Germanium has 18 core electrons. Core electrons are the inner electrons of an atom that are not involved in chemical bonding.
Argon has 18 core electrons. This is because it has 18 electrons in total, and the core electrons are the innermost electrons that are not involved in chemical bonding.
Tungsten has 46 core electrons. Core electrons are the electrons found in all elements that are not valence electrons. Tungsten has an atomic number of 74, so it has 74 electrons in total.
Fluorine (F) has 9 core electrons, which are the electrons in the inner electron shells. It has 2 electrons in the first shell and 7 electrons in the second shell, making a total of 9 core electrons.