Question

changing the number of protons in an atom will change which of the following? (choose all that apply) the atoms mass the identity of the element the charge of the atom none of the above

Explanation:

• The atom's mass: Protons contribute to the atomic mass (mass number = protons + neutrons). Changing the number of protons will change the mass.
• The identity of the element: The number of protons (atomic number) defines the element. For example, hydrogen has 1 proton, helium has 2. Changing protons changes the element.
• The charge of the atom: In a neutral atom, protons (+) equal electrons (-). If protons change (assuming electrons don't adjust immediately), the charge changes. For instance, adding a proton to a neutral atom makes it +1 charged (if electrons stay same).

Answer:

The atom's mass, The identity of the element, The charge of the atom