if you change the number of electrons... mass #: stays constant, changes charge: stays constant, changes…

Explanation:

Step1: Recall atomic - structure concepts

The mass number of an atom is the sum of protons and neutrons. Electrons have negligible mass compared to protons and neutrons. So, changing the number of electrons does not affect the mass number.

Step2: Analyze charge change

An atom is neutral when the number of protons (positive charge) equals the number of electrons (negative charge). Changing the number of electrons changes the net charge of the particle.

Step3: Consider atom identity

The identity of an atom is determined by the number of protons (atomic number). Changing the number of electrons does not change the number of protons, so the atom's identity remains the same.

For Challenge 2: The element with 5 protons is Boron (B). The mass number is given as 5. The number of protons = 5, number of neutrons = 5. For a neutral atom, the number of electrons equals the number of protons, so number of electrons = 5. Charge = 0 means it is a neutral atom (not an ion), and Boron - 10 (mass number 10 is more common stable isotope, but with given data of mass number 5, it is an unstable isotope).

Answer:

Mass #: Stays Constant Charge: Changes Atom Name (Identity): Stays Constant Element Name: Boron Element Symbol: B Mass Number: 5

of Protons: 5

of Neutrons: 5

of Electrons: 5

Charge: 0 Ion?: No (Neutral Atom) Stable?: No