Question

1. using all of the rules you have determined, figure out what changes for each of these changes to an atom or ion. if you have new ideas, go back and rewrite your rules.

make the change: what changes also? element name, charge, mass?
add a proton
remove a neutron
remove an electron
add an electron

Explanation:

Step1: Analyze adding a proton

Adding a proton changes the atomic number. Since the atomic number defines the element, the element name changes. A proton has a charge of +1, so the overall charge of the atom or ion increases by 1. A proton has mass, so the mass also increases.

Step2: Analyze removing a neutron

Neutrons have mass but no charge. Removing a neutron changes the mass of the atom or ion but does not change the element name (as the atomic number is unchanged) and does not change the charge.

Step3: Analyze removing an electron

Electrons have a charge of - 1. Removing an electron makes the atom or ion more positively - charged, so the charge changes. The element name and mass are not affected as electrons have negligible mass compared to protons and neutrons and do not define the element.

Step4: Analyze adding an electron

Adding an electron makes the atom or ion more negatively - charged, so the charge changes. The element name and mass are not affected as electrons have negligible mass compared to protons and neutrons and do not define the element.

Answer:

Make the change	What changes also? Element name, charge, mass?
Remove a neutron	Mass decreases, element name and charge unchanged
Remove an electron	Charge becomes more positive, element name and mass unchanged
Add an electron	Charge becomes more negative, element name and mass unchanged