It defines the element. If you change the protons, you change the type of element. A proton is positively charged and is most of the mass of the atom, next to the neutron. Neutrons have a very very very slightly higher mass.
<u>Answer:</u> The moles of hydrochloric acid is 
<u>Explanation:</u>
To calculate the molarity of solution, we use the equation:

Or,

We are given:
Molarity of solution = 0.5173 M
Volume of solution = 
Putting values in above equation, we get:

Hence, the moles of hydrochloric acid is 
Answer:
atoms have no overall charge. this is because they contain equal numbers of positive protons and negative electrons
Answer:
3 protons and also 3 electrons
Explanation:
z=p=e