Chapter U1.13, Problem 4E

Interpretation Introduction

(a)

Interpretation:

Number of protons, neutrons and electrons in fluorine - 23 should be written.

Concept introduction:

An atom consists of subatomic particles like protons, neutrons and electrons. Atomic number denotes the number of protons or electrons in an atom. Mass number denotes the sum of number of protons and neutrons in an atom.

Answer to Problem 4E

Fluorine - 23 has 9 protons, 9 electrons and 14 neutrons.

Explanation of Solution

From the periodic table, one can see that atomic number of fluorine is 9

Number of protons = number of electrons = atomic number = 9

Fluorine -23 has mass number = 23

Mass number = number of protons + number of neutrons

Number of neutrons = mass number − number of protons

= 23 - 9

= 14

(b)

Interpretation Introduction

Interpretation:

Number of protons, neutrons and electrons in ${}_{27}^{59}\text{Co}$ should be written.

Concept introduction:

An atom consists of subatomic particles like protons, neutrons and electrons. Atomic number denotes the number of protons or electrons in an atom. Mass number denotes the sum of number of protons and neutrons in an atom.

Answer to Problem 4E

${}_{27}^{59}\text{Co}$ has 27 protons, 27 electrons and 32 neutrons.

Explanation of Solution

From the isotope symbol, one can see that atomic number of cobalt is 27

Number of protons = number of electrons = atomic number = 27

${}_{27}^{59}\text{Co}$ has mass number = 59

Mass number = number of protons + number of neutrons

Number of neutrons = mass number − number of protons

= 59 - 27

= 32

(c)

Interpretation Introduction

Interpretation:

Number of protons, neutrons and electrons in molybdenum - 96 should be written.

Concept introduction:

An atom consists of subatomic particles like protons, neutrons and electrons. Atomic number denotes the number of protons or electrons in an atom. Mass number denotes the sum of number of protons and neutrons in an atom.

Answer to Problem 4E

Molybdenum - 96 has 42 protons, 42electrons and 54 neutrons.

Explanation of Solution

From the periodic table, one can see that atomic number of molybdenum is 42

Number of protons = number of electrons = atomic number = 42

Molybdenum - 96 has mass number = 96

Mass number = number of protons + number of neutrons

Number of neutrons = mass number − number of protons

= 96 - 42

= 54