Answer:
The correct answer would be A. numbers of neutrons.
Isotopes refer to the types or forms of the same element which contain same numbers of protons but different numbers of neutrons due to which they differ in mass number.
For example, carbon 14 and carbon 12 are isotopes of carbon. Carbon 14 contains 8 neutrons whereas carbon 12 contains 6 neutrons.
Similarly, Protium (¹H), deuterium (²H), and tritium (³H) are isotopes of hydrogen.
This is refered to as the chemical symbol. It is derived from the Latin name for the element which is why some elements like potassium (K) and sodium (N) have symbols different from their name on the periodic table.
Each mastoid process is located on a <u>temporal </u>bone and provides attachment for <u>digastric </u>muscles.
<h3>What is the mastoid process?</h3>
The mastoid process is a bone present on the lateral side of the face. It is present in the mastoid process of is present on the area of the temporal bone.
The mastoid process allows the muscles to joins. It joins the sternocleidomastoid, the posterior belly of the digastric muscle, splenius capitis, and longissimus capitis.
Thus, the digastric muscles can attach to each mastoid process, which is found on a temporal bone.
To learn more about the mastoid process, refer to the link:
brainly.com/question/2158881
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Earthquakes with magnitudes between 1.0 and 2.9 on the richer scale are low, and usually not felt.
Some have been noted to live as long as 6 days without there head.