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Selenium should gain two electrons and lose six electrons to achieve a noble gas electron configuration.
Calcium loses two electrons to obtain a noble-gas electron configuration.
Aluminum needs to lose 3 electrons to gain a noble gas electron configuration.
Iodine accepts one electron to achieve noble gas configuration. Strontium loses two electrons to achieve noble gas configuration. Nitrogen accepts three electrons to achieve noble gas configuration. Krypton already has a noble gas configuration.
Silicon has 4 valence electrons. No noble gases will have 4 valence electrons.
Losing an electron cesium has a noble gas configuration.
Two electrons
Selenium should gain two electrons and lose six electrons to achieve a noble gas electron configuration.
Calcium loses two electrons to obtain a noble-gas electron configuration.
They achieve the electron configuration of a noble gas.
In noble gas notation, you don't have to write the electron configuration up to that noble gas. You simply put the noble gas in brackets [noble gas] and then continue to write the electron configuration from that point. It just makes it shorter and easier to write electron configurations for elements with a lot of electrons.
Aluminum needs to lose 3 electrons to gain a noble gas electron configuration.
Iodine accepts one electron to achieve noble gas configuration. Strontium loses two electrons to achieve noble gas configuration. Nitrogen accepts three electrons to achieve noble gas configuration. Krypton already has a noble gas configuration.
nitrogen has 5 valence electrons. It should gain 3 electrons to achieve a noble gas configuration.
Silicon has 4 valence electrons. No noble gases will have 4 valence electrons.
an element with 2 valence electrons can obtain a stable electron configuration by "kicking out" two electrons to have the same electron config as the noble gas in the previous period
Fr is in the 1st period. It removes an electron to get noble gas configuration. Fr+ does not have valence electrons.Francium has 1 electron in its outermost energy level. It donates its outermost electron to stabilize its electron configuration. Francium(I) has no valence electrons.