How do scientists determine the number of neutrons in an isotope of an atom?

a. they find the number of protons.

b. they divide the atomic mass by two.

c. they add the number of electrons and protons.

d. they subtract the atomic number from the atomic mass.

Identify one disadvantage to each of the following models of electron configuration: -dot structures -arrow and line diagrams -written electron configurations type in your answer below. (answer) -dot structures do not show the distribution of electrons in orbitals and take up a lot of space. -arrow and line diagrams take up a lot of space and make it difficult to count electrons. -written configurations make it easy to lose count of electrons and do not show the distribution of electrons in orbitals.

What human activity increases beach erosion?

List the path of the respiratory system