Odpowiedź:
1. Elements make up all substances.
2. Identical atoms make up elements.
3. Atoms consist of protons, neutrons and electrons.
4. Inside there are protons and neutrons, while outside there are electrons.
5. Shells consist of electrons and orbit around protons and neutrons.
6. Valence electrons are electrons in the outermost shell.
7. Neutrons do not have an electric charge.
8. Electricity is generated when valence electrons are free to move from one atom to another.
Wyjaśnienie:
