The answers that are correct are a, b, and d
You can put an egg in Vinegar an egg in Olive oil
While the number nuclear protons as given is 34, and therefore we deal with the element selenium, there are 2 more electrons than protons, and therefore this species has an overall
2
−
charge.
We represent this selenide ion as
S
e
2
−
. Do I win 5 pounds?
Z= 34, therefore the atom is selenium
1.6456 x 10^3 (ten to the third power)
