Answer
A.
Explanation:
All of them have an a and only two have a B. Thats my best guess
Answer:
Hydrogen, Lithium, Aluminum, Argon, Nickel, Iodine, Gold, Mercury
Explanation:
Hydrogen has 1 proton.
Lithium has 3 protons.
Aluminum has 13 protons.
Argon has 18 protons.
Nickel has 28 protons.
Iodine has 53 protons.
Gold has 79 protons.
Mercury has 80 protons.
Hope this helps.
