Holy I'm not that smart lol but I'll get back to you
Answer:
Ernest Rutherford
Explanation:
The Rutherford model, proposed originally in 1911, dipicts a planetary model of the atom in which there is a nucleus and electrons circling it.
Anytime an atom shares or transfers electrons a bond is formed, sharing= covalent and transfer= ionic
Energy would be the correct answer
Barium fluoride (BaF2) - Also known as Barium(II) fluoride - because it's a combination of two different kinds of ions (binary = two).