protons because of the atomic number
The little number you see to the right of the symbol for an element is called a subscript.
Physical changes can be reversed and chemical changes can’t be reversed. A physical property is a characteristic which can be identified without changing the substance but to identify a chemical property, you do have to change the substance.
Answer:
Atoms of matter are electrically neutral because their nuclei contain the same number of protons as there are electrons surrounding the nuclei. Electric current and charged objects involve the separation of some of the negative charge of neutral atoms.
Polyatomic ion: a covalently bonded group of atoms that has a positive or negative charge and acts as a unit.
