Question

Give the number of protons, electrons, and neutrons in neutral atoms of each of the following isotopes:

(a) 7,3 Li
(b) 125,52 Te
(c) 109,47 Ag
(d) 15,7 N
(e) 31,15 P

Answer 1

In neutral atoms of the given isotopes, the number of protons and electrons is the same as the atomic number, while neutrons can be calculated by subtracting the atomic number from the mass number.

Step-by-step explanation:

The number of protons, electrons, and neutrons in neutral atoms of various isotopes can be found using the atomic number (which equals the number of protons and, in neutral atoms, the number of electrons) and the mass number (which equals the sum of protons and neutrons). Below are the requested details for each specified isotope:

(a) 7,3 Li: This isotope has 3 protons, 3 electrons (since it's a neutral atom), and 4 neutrons (7 - 3).

(b) 125,52 Te: This isotope has 52 protons, 52 electrons, and 73 neutrons (125 - 52).

(c) 109,47 Ag: This isotope has 47 protons, 47 electrons, and 62 neutrons (109 - 47).

(d) 15,7 N: This isotope has 7 protons, 7 electrons, and 8 neutrons (15 - 7).

(e) 31,15 P: This isotope has 15 protons, 15 electrons, and 16 neutrons (31 - 15).

Answer 2

(a) 7,3 Li: 3 protons, 3 electrons, 4 neutrons.

(b) 125,52 Te: 52 protons, 52 electrons, 73 neutrons.

(c) 109,47 Ag: 47 protons, 47 electrons, 62 neutrons.

(d) 15,7 N: 7 protons, 7 electrons, 8 neutrons.

(e) 31,15 P: 15 protons, 15 electrons, 16 neutrons.

Step-by-step explanation:

In the case of the isotopes in neutral atoms, the number of electrons and protons is equal to the atomic number, the number of neutrons is equal to the number of the isotope minus the atomic number.

(a) 7,3 Li

The number of protons: 3.

Number of electrons: 3.

Number of neutrons: 7-3=4.

(b) 125,52 Te

The number of protons: 52.

Number of electrons: 52.

Number of neutrons: 125-52=73.

(c) 109,47 Ag

The number of protons: 47.

Number of electrons: 47.

Number of neutrons: 109-47=62.

(d) 15,7 N

The number of protons: 7.

Number of electrons: 7.

Number of neutrons: 15-7=8.

(e) 31,15 P

The number of protons: 15.

Number of electrons: 15.

Number of neutrons: 31-15=16.