Question

chemical formula for barium ion?
And how do you know that? 😰😭 please help

Answer 1

Ba +2

Answer 2

yea... but how did you get that ?

Answer 3

barium would need to lose 2 electrons to have a full valence shell

Answer 4

meaning..?

Answer 5

do you have periodic table with you?

Answer 6

yes i do

Answer 7

barium is a group 2 element meaning it is in the second column
and all element want to be "happy" by haveing a full valence shell

Answer 8

a valence shell is the outtermost shell of an electron

Answer 9

and a ful valence shell has 8 electrons in totall

Answer 10

and since barium is in the secend period it has 2 valence elecrtons and it would need to lose 2 or gain 6 inorder to have a ful valence shell

Answer 11

oh. so losing two is better since its lower yes?

Answer 12

and since it's easier to lose 2 it would get rid of 2 elecrtons so it would have a positive charge of 2

Answer 13

ahh thanks !

Answer 14

np:)

Answer 15

and remember this
the charges are opposite if an element loses electron it has a positive charge and when elements gain electron they have a negative charge