Question

Use the model below to answer the following question. You must answer the question using the CER (claim, evidence, and reasoning) format. Electron shell Hydrogen-1 mass number: Hydrogen-2, deuterium mass number: 2 Hydrogen-3, tritium mass number: 3. Are the three atoms above isotopes of the same element?"

A) Yes, they are isotopes of the same element.
B) No, they are not isotopes of the same element.
C) Only Hydrogen-1 and Hydrogen-2 are isotopes.
D) Only Hydrogen-2 and Hydrogen-3 are isotopes.

Answer 1

Hydrogen-1, Hydrogen-2 (deuterium), and Hydrogen-3 (tritium) are isotopes of the same element, hydrogen, as they all have the atomic number 1 but different neutron counts.OPTION(A).

Step-by-step explanation:

Claim: Yes, Hydrogen-1, Hydrogen-2 (deuterium), and Hydrogen-3 (tritium) are isotopes of the same element.

Evidence: Hydrogen-1 has one proton and no neutrons, Hydrogen-2 (deuterium) has one proton and one neutron, and Hydrogen-3 (tritium) has one proton and two neutrons. The atomic number for hydrogen, which determines the element type, is 1 in all cases.

Reasoning: Isotopes are atoms of the same element that have the same number of protons (Z) but different numbers of neutrons (N). Since the given forms of hydrogen all have one proton, they all belong to the same element, hydrogen, with different mass numbers due to their varying numbers of neutrons. These differences give them distinct physical properties, but they retain identical chemical properties.