Question

the table below describes four atoms. atom a: number of protons 79, number of neutrons 118, number of electrons 79. atom b: number of protons 80, number of neutrons 120, number of electrons 80. atom c: number of protons 80, number of neutrons 118, number of electrons 80. atom d: number of protons 79, number of neutrons 120, number of electrons 79. which atoms represent the same element? select all that apply. atom a and atom d, atom b and atom d, atom a and atom b, atom a and atom c, atom b and atom c, atom a and atom d

Explanation:

Step1: Recall element - definition

Elements are defined by the number of protons. Atoms with the same number of protons are the same element.

Step2: Compare proton numbers

Atom A has 79 protons, Atom B has 80 protons, Atom C has 80 protons, and Atom D has 79 protons.

Step3: Identify same - element atoms

Atom A and Atom D have the same number of protons (79), and Atom B and Atom C have the same number of protons (80).

Answer:

Atom A and Atom D; Atom B and Atom C