Question

1. add a neutron to your previously built atom. what does adding the neutron affect? (select all that apply) (1 point)

□ the name of the element
□ the mass of the atom
□ the charge of the atom

1. add an electron to your previously built atom. what does adding the electron affect? (select all that apply) (1 point)

□ the name of the element
□ the charge of the atom
□ the mass of the atom

1. create a nitrogen atom. add or subtract particles to see what happens. based on your experimentation, what do all nitrogen atoms have in common? (1 point)

○ same number of electrons
○ same number of neutrons
○ same number of protons

Explanation:

Question 4 (Adding a neutron)

• The name of an element is determined by the number of protons (atomic number). Adding a neutron doesn't change the number of protons, so the element's name remains the same.
• The mass of an atom is the sum of protons and neutrons. Adding a neutron increases the total number of nucleons (protons + neutrons), so the mass of the atom increases.
• The charge of an atom is determined by the balance of protons (positive charge) and electrons (negative charge). Neutrons have no charge, so adding a neutron doesn't affect the charge.

• The name of the element is based on the number of protons, and adding an electron doesn't change the number of protons, so the element's name doesn't change.
• The charge of an atom is the difference between the number of protons (positive) and electrons (negative). Adding an electron (negative charge) will change the charge (e.g., a neutral atom becomes negative if an electron is added).
• The mass of an electron is very small (about 1/1836 of a proton/neutron mass), so adding an electron has a negligible effect on the atom's mass.

• The number of electrons can change if the atom is ionized (loses or gains electrons), so not all nitrogen atoms have the same number of electrons.
• Isotopes of nitrogen exist (atoms with the same number of protons but different numbers of neutrons), so the number of neutrons can vary.
• The atomic number (number of protons) defines an element. All nitrogen atoms must have the same number of protons (7, since nitrogen has an atomic number of 7) to be nitrogen.

Answer:

• the mass of the atom

Question 5 (Adding an electron)