Respuesta :
From the table below;
Element B has two isotopes; One with a mass of 10.01 and a relative abundance of 19,91, while the other has a mass of 11.01 and a relative abundance of 80.09.
The average atomic mass = (10.01 × 19.91) + (11.01 × 80.09)
= 1.99 + 8.817 = 10.81
Therefore; the average atomic mass is 10.81.
Element B has two isotopes; One with a mass of 10.01 and a relative abundance of 19,91, while the other has a mass of 11.01 and a relative abundance of 80.09.
The average atomic mass = (10.01 × 19.91) + (11.01 × 80.09)
= 1.99 + 8.817 = 10.81
Therefore; the average atomic mass is 10.81.
The atomic mass of the element is the number of protons and the neutrons added together. The average atomic mass of B is 10.81. Thus, option c is correct.
What is an isotope?
The element having the same atomic number and also shares the same position in the periodic table is the isotope.
From the table, it can be inferred that the two isotopes of B have a mass of 10.01 and 11.01 respectively with a relative abundance of 19.91 and 80.09.
Thus, the average atomic weight:
(10.01 × 19.91) + (11.01 × 80.09) = 1.99 + 8.817 = 10.81
Therefore, option C. 10.81 is the atomic mass.
Learn more about atomic mass here:
https://brainly.com/question/13179757
#SPJ5
