Beryllium, Hydrogen and Neon elements will become positive when they become ions. Hence, options I, II and IV are the correct answer.
What is an ion?
There are two types of ion:
Cation: When an atom loses electrons, it will form a positive ion known as a cation.
Anion: When an atom gains electrons, it will form a negative ion known as an anion.
Be will become [tex]Be^{+2}[/tex], H will become [tex]H^+[/tex] and Ne will become [tex]Ne^+[/tex]
Hence, options I, II and IV are the correct answer.
Learn more about ions here:
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