Question

Isotopes are:

Answer 1

Hello and Good Morning/Afternoon

Let's consider all the choices to determine the attributes of isotopes

• Choice (A) is wrong

        ⇒ isotopes are often found in nature as they are often the atoms

            that form the world around us

• Choice (B) is wrong

        ⇒ isotopes describe a certain type of atom with a certain

             characterist that exists, thus it isn't theoretical

• Choice (C) is wrong

        ⇒ as said before, isotopes are found in nature and form the world

• Choice (D) is correct

        ⇒Isotopes are a type of atoms thus they are found in nature

Answer: (D)

Hope that helps!

#LearnwithBrainly

Answer 2

Answer:

D. found in nature.

Explanation:

Isotope is any of two or more forms of a chemical element, having the same number of protons in the nucleus, or the same atomic number, but having different numbers of neutrons in the nucleus, or different atomic weights. There are 275 isotopes of the the 81 stable elements, in addition to over 800 radioactive isotopes, and every element has known isotopic forms. Isotopes of a single element possess almost identical properties.  An isotope of an element is just a version of that element with a particular number of neutrons. Some numbers are stable, some are not; the ones that aren't shoot particles out at extremely high speeds ("radiation").

Since radioisotopes generally have the same chemistry as their stable counterparts (since neutrons play almost no role in chemistry), they'll get wherever other atoms of that element would get. Iodine, for example, accumulates in your thyroid gland - so do radioactive forms of iodine, which can then cause thyroid cancer by irradiating it from the inside.

Also because they're chemically almost indistinguishable, they're almost impossible to separate out by any normal means. It's like giving someone a giant bin of golf balls, some of which are 1% heavier than the other golf balls but are otherwise exactly the same, and saying "okay, sort these". Except the golf balls are atoms and the bin is the size of a small country.