Luis207 Luis207

20-01-2021
Physics

contestada

An atom of element X has one more
shell of electrons than an atom of
calcium, but it has one less valence
electron than calcium. Which element
is element X?

Respuesta :

nhinhutiensach nhinhutiensach

20-01-2021

Answer:

Rubidium or Rb

Explanation:

Use the periodic table, the period numbers are number of shells while the group numbers are numbers of valence electrons

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