shay7265 shay7265
  • 03-11-2020
  • Chemistry
contestada

Why are both lithium and cesium alkali metals, when lithium has three electrons
and cesium has 55

Respuesta :

quasarJose
quasarJose quasarJose
  • 04-11-2020

Answer:

Because they both have one electron in their outermost shell

Explanation:

Both lithium and cesium are classified as alkali metals because they both have just one electron in their outermost shell.

 The electronic configuration of both atoms are:

          Lithium  = 2, 1

          Cesium  = 2, 8, 18, 18, 8, 1

Now we can see that the outer shell of both elements have just one electrons.

Division into groups is based on the number of outer most shell of each element

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