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?

Question

asked Mar 7, 2022 20.2k views

1 Answer

Victor Grazi · Answer 1 · 2022-03-13T21:31:31+0000

Answer:

Rubidium or Rb

Step-by-step explanation:

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