Question

1. Consider the species 72Zn, 75As and 74Ge. These species have: (a) the same number of electrons. (b) the same number of protons. (c) the same number of neutrons. (d) the same number of protons and neutrons. 2. Find the number of neutrons of isotopes of magnesium Isotope: Relative isotopic mass 24Mg 24.0 25Mg 25.0 26Mg 26.0​

Answer 1

Ответ:

الله وبركاته صباح النور يا حبيبتي يا ام احمد

Объяснение:

الله يسعدك يارب ويوفقك يا ابو محمد وعلى نينانثح

Answer 2

Let's break down each of your questions:

1. Consider the species 72Zn, 75As, and 74Ge. These species have:

   (a) the same number of electrons. (b) the same number of protons. (c) the same number of neutrons. (d) the same number of protons and neutrons.

To determine the answers, we need to look at the atomic numbers (number of protons) and mass numbers (sum of protons and neutrons) for each of these species.

• 72Zn: Atomic number (number of protons) = 30, Mass number = 72.
• 75As: Atomic number (number of protons) = 33, Mass number = 75.
• 74Ge: Atomic number (number of protons) = 32, Mass number = 74.

Now, let's answer each part:

(a) The same number of electrons: No, they do not have the same number of electrons because the number of electrons in an atom is determined by the atomic number, and these elements have different atomic numbers.

(b) The same number of protons: No, they do not have the same number of protons because they have different atomic numbers.

(c) The same number of neutrons: No, they do not have the same number of neutrons because they have different mass numbers.

(d) The same number of protons and neutrons: No, they do not have the same number of protons and neutrons because both protons and neutrons are determined by the atomic and mass numbers, which are different for each element.

2. Find the number of neutrons of isotopes of magnesium (24Mg, 25Mg, 26Mg):

The number of neutrons in an isotope can be calculated by subtracting the number of protons (which is equal to the atomic number) from the mass number.

• For 24Mg: Atomic number (number of protons) = 12, Mass number = 24 Number of neutrons = Mass number - Atomic number = 24 - 12 = 12 neutrons.

• For 25Mg: Atomic number (number of protons) = 12, Mass number = 25 Number of neutrons = Mass number - Atomic number = 25 - 12 = 13 neutrons.

• For 26Mg: Atomic number (number of protons) = 12, Mass number = 26 Number of neutrons = Mass number - Atomic number = 26 - 12 = 14 neutrons.

So, the number of neutrons for each isotope of magnesium is as follows:

• 24Mg has 12 neutrons.
• 25Mg has 13 neutrons.
• 26Mg has 14 neutrons.