write the valence shell electronic configuration for the alkali metals group
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The elements in Group 1 (lithium, sodium, potassium, rubidium, cesium, and francium) are called the alkali metals. ... For example, the electron configuration of lithium (Li), the alkali metal of Period 2, is 1s22s1. This single valence electron is what gives the alkali metals their extreme reactivity
The elements in Group 1 (lithium, sodium, potassium, rubidium, cesium, and francium) are called the alkali metals. ... For example, the electron configuration of lithium (Li), the alkali metal of Period 2, is 1s22s1. This single valence electron is what gives the alkali metals their extreme reactivity.The electrons in the highest numbered subshells are the valence electrons, which comprise the valence shell of the atom. For brevity, many chemists record the electron configuration of an atom by giving only its outermost subshell, like 4 s 1 for potassium or 4 s 2 for calcium.The alkali metal must contain 1 electron in its outermost shell.Barkla, a spectroscopist who studied the X-rays that are emitted by atoms when they are hit with high energy electrons. He noticed that atoms appeared to emit two types of X-rays. ... This innermost shell is now called the K-shell, after the label used for the X-ray.4s2 not the third shell, but the next 10 electrons go into the 3d orbitals that are part of the third shell but shown on the fourth shell level. ... So the third shell can be considered to hold 8 or 18 electrons but in total the third shell can hold 18 electrons.