# How Many Neutrons and Electrons in Trinegative Ion of Arsenic-71?

## a. How many neutrons are there in the trinegative ion of As-71?

No of neutrons for tri-negative ion of As-71 will be 38.

## b. How many electrons are there in this isotope?

No of electrons for trinegative ion of As-71 is 36.

## Answer:

For the trinegative ion of Arsenic-71, there are 38 neutrons and 36 electrons.

Arsenic-71 is an isotope of Arsenic with an atomic mass of 71 amu. To determine the number of neutrons in the trinegative ion of As-71, we subtract the atomic number from the mass number. The atomic number of Arsenic is 33, so the calculation is:

No. of neutrons = Mass number - Atomic number = 71 - 33 = 38 neutrons

As the trinegative ion of Arsenic-71 has gained 3 electrons, the total number of electrons can be calculated by adding the atomic number and the electrons gained:

No. of electrons = Atomic number + electrons gained = 33 + 3 = 36 electrons

Therefore, the trinegative ion of Arsenic-71 has 38 neutrons and 36 electrons. This information helps us understand the composition of this isotope and its behavior in chemical reactions.