Atom basics quiz [LVL 2+]

Hello there,
I made another quiz. This time it is about atom basics. I know this is not a very popular theme for many people but life is not always easy so deal with it. :) Many thanks to Oppenh4imer who checked and corrected the quiz before I posted it here.

The game I offer is Contagion.

The system is easy. All you have to do is to add one by one the correct numbers/letters of the right answers to the base address https://www.steamgifts.com/giveaway/ and add slash to the end. So that the final address would look similar like, for example, https://www.steamgifts.com/giveaway/C7bNV/

Level restriction is set to 2+. The size of letters does matter so think of it. I highly recommend using copy/paste (ctrl+c and ctrl+v).

PS: Don't forget to bump it if you like it.
PS2: if you want to know if there are some other quizes by me, check this list of all my quizes and jigidi puzzles.

An element is determined by the number of

• G) Electrons
• 2) Neutrons
• S) Protons

The nucleus of an atom consists of

• m) Electrons
• P) Protons and neutrons
• 4) Protons, neutrons, and electrons

Changing the number of neutrons of an atom changes its

• i) Isotope
• e) Element
• F) Charge

The three basic components of an atom are

• P) Protons, neutrons, and ions
• x) Protons, neutrons, and electrons
• 5) Protons, neutrinos, and ions

Which electric charge does a proton have?

• m) Positive
• 3) Negative
• a) Neutral