Question

1. identify which particle can be added or removed from the carbon atom to change the mass number, but not the identity of the element as carbon. i need a hint proton neutron electron

Explanation:

1. Recall the definitions: The identity of an element is determined by the number of protons (atomic number). Mass number is the sum of protons and neutrons.
2. Analyze each particle:

• Proton: Changing the number of protons changes the atomic number, hence the element's identity (e.g., adding a proton to carbon would make it nitrogen).
• Neutron: Adding or removing neutrons changes the mass number (since mass number = protons + neutrons) but does not change the atomic number (number of protons remains the same for carbon), so the element remains carbon (these are called isotopes).
• Electron: Electrons have negligible mass compared to protons and neutrons, so adding or removing electrons does not significantly change the mass number. Also, electrons affect charge, not the element's identity or mass number in a way that changes the mass number meaningfully here.

Answer:

Neutron