What statement is TRUE about the subatomic particles within an atom? a

Protons and electrons have the same mass.

b

Protons have a positive charge and are found in the nucleus.

c

Neutrons are negative and are found outside the nucleus.

d

Electrons are negative and are found in the nucleus.

The three subatomic particles in an atom are protons, neutrons, and electrons:

Protons have a relative mass of 1 and a charge of +1, and they are found in the nucleus of an atom.

Neutrons have a relative mass of 1 and no charge, and they are also found in the nucleus of an atom.

Electrons have a relative mass of 1/1836 and a charge of -1. They are found in specific orbits around the nucleus and are held in these orbits by the positive charge of the protons in the nucleus.

2fe + 3h2so4 -> fe2(so4)3 + 3h2

it is necessary to balance equations in order to get the proper amount of reactants as well as products in order not to make a miscalculation.

you cannot change the subscripts as that would change the substance itself. for instance, diatomic elements such as h2 only have the subscript two when a gas. another example would be so4, if you were to change the subscript, the element would no longer be sulfate.

we change the coefficients instead as that only changes the number of molecules rather than the substance itself.

hope this !