Question

Write the formula obtained when this atoms loses or gains valence electrons and becomes an ion. Tell whether it is a cation or an anion. Be

Answer 1

Be+2 cation

Answer 2

Be atomic number is 4.
which means the valence shells are filled like K=2 L=2.
now L can have 8 electrons , so the stable configuration will be K=2 L=0 so it loses 2 electrons so its Be 2+.

cations are +ve and anions are -ve , so Be 2+ is a cation.
Understood ? :)

Answer 3

thank you n yes

Answer 4

no mention

Answer 5

B2- anion