Question

75As3- what is it’s protons, neutrons, and electrons?

Answer 1

An ion of 75As3- has 33 protons, 36 electrons, and 42 neutrons. The 3- charge indicates it has three more electrons than protons, and the mass number 75 helps determine the number of neutrons by subtracting the number of protons.

Step-by-step explanation:

The student's question is about determining the number of protons, neutrons, and electrons in the chemical species 75As3-. To address this question, we need to understand the meaning of the symbol. The number 75 represents the mass number, which is the sum of protons and neutrons. The symbol As represents arsenic, which has an atomic number of 33; this tells us that arsenic has 33 protons. The charge indicated by 3- means that the ion has three more electrons than protons.

To find the numbers of each subatomic particle, we follow these steps:

• Protons: The atomic number of arsenic (As) is 33, so there are 33 protons.
• Electrons: Since the ion has a 3- charge, there are three more electrons than protons. Therefore, 33 protons + 3 extra electrons = 36 electrons.
• Neutrons: To find the number of neutrons, we subtract the number of protons from the mass number: 75 (mass number) - 33 (protons) = 42 neutrons.

Therefore, the 75As3- ion has 33 protons, 36 electrons, and 42 neutrons.

Answer 2

Atomic Particles

Atoms consist of three basic particles: protons, electrons, and neutrons. The nucleus (center) of the atom contains the protons (positively charged) and the neutrons (no charge). The outermost regions of the atom are called electron shells and contain the electrons (negatively charged).