The missing number of sub-atomic particles occurring in isotopes of germanium is to be determined. Concept Introduction: Atomic number : Number of protons present in the atom are known as atomic number of atom. Atomic number = Number of protons Mass number: The number of protons and neutrons present inside the nucleus of atom are known as mass number. Mass number = Number of protons + Number of neutrons Number of protons: The atomic number of an atom denotes the number of protons. Number of protons = Atomic number Number of neutrons: We get number of neutrons from mass number after subtracting number of protons from mass number because mass number is sum of number of protons and neutrons. Number of neutrons = Mass number - Number of protons Number of electrons: In a neutral atom (non-ionic) the number of electrons is equal to the number of protons. Number of electrons = Number of protons Given: The table for three of the naturally occurring isotopes of germanium. Atomic symbol G 32 70 e G 32 73 e G 32 76 e Atomic number Mass number Number of protons Number of neutrons Number of electrons

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Chapter 4, Problem 4.55UTC

Interpretation Introduction

Interpretation:

The missing number of sub-atomic particles occurring in isotopes of germanium is to be determined.

Concept Introduction:

Atomic number: Number of protons present in the atom are known as atomic number of atom.

$Atomic number = Number of protons$

Mass number: The number of protons and neutrons present inside the nucleus of atom are known as mass number.

$Mass number = Number of protons + Number of neutrons$

Number of protons: The atomic number of an atom denotes the number of protons.

$Number of protons = Atomic number$

Number of neutrons: We get number of neutrons from mass number after subtracting number of protons from mass number because mass number is sum of number of protons and neutrons.

$Number of neutrons = Mass number - Number of protons$

Number of electrons: In a neutral atom (non-ionic) the number of electrons is equal to the number of protons.

$Number of electrons = Number of protons$

Given:

The table for three of the naturally occurring isotopes of germanium.

Atomic symbol

${}_{32}^{70}G e$ ${}_{32}^{73}G e$ ${}_{32}^{76}G e$

Atomic number

Mass number

Number of protons

Number of neutrons

Number of electrons

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