Question

1. refer to the hydrogen isotopes in model 1. each isotope has a special name derived from latin (protium, deuterium, and tritium). what structural feature do these names refer to in the atom?
2. can two atoms with the same mass number ever be isotopes of each other? explain.
3. all models have limitations. what characteristics of model 1 are inconsistent with your understanding of what atoms look like?

Explanation:

1. Isotopes of hydrogen have names based on the number of neutrons. Protium has 0 neutrons, deuterium has 1, and tritium has 2.
2. Isotopes are atoms of the same element with different numbers of neutrons. Two atoms with the same mass - number but different elements cannot be isotopes. If they are the same element, they are the same atom, not isotopes.
3. Model limitations could include not accurately representing the quantum - mechanical nature of electrons (e.g., electrons are shown in fixed orbits in some simple models instead of probability clouds).

Answer:

1. The names refer to the number of neutrons in the atom.
2. No. Isotopes are of the same element with different neutron numbers. If mass numbers are the same and they are the same element, they are identical atoms, not isotopes; if they are different elements, they cannot be isotopes.
3. Simple models may not represent the quantum - mechanical behavior of electrons accurately, such as showing electrons in fixed orbits instead of probability distributions.