Question

QUESTION 3Which of the following images represent the atomic structure of Fe2*, The circle represents the nucleus andthere are subatomic particles shown inside and outside the nucleus. (The shells are omitted)26e-23e-24e-23e

Answer 1

To solve this question, we need to know the mass number and atomic number of Fe. For this, we look at the periodic table.

Mass number of Fe: 55

Atomic number: 26

- The number of protons is equal to the atomic number of the element. So the number of protons (p+) is 26.

- The number of electrons in an atom that is neutral is the same as its number of protons. In this case, we don't have a neutral atom, we have a cation, Fe²⁺. The charge 2+ means that it lost 2 electrons in relation to its neutral atom. So we just subtract 26 - 2 = 24. The number of electrons (e-) is equal to 24.

- The number of neutrons we calculate using the following formula:

n = A - p

where: n = number of neutrons; A = atomic mass; p = number of protons.

A = 55

p = 26

n = 55 - 26 = 29

n = 29

Answer: p+ = 26

e- = 24

n = 29

Alternative "C"