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Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425

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Chapter
Section
BuyFindarrow_forward

Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425
Textbook Problem

Exercise 4.2 Give the number of protons, neutrons, and electrons in the atom symbolized by 38 90 Sr . Strontium-90 occurs in fallout from nuclear testing. It can accumulate in bone marrow and may cause leukemia and hone cancer.

Interpretation Introduction

Interpretation:

The number of protons, neutrons, and electrons in 90 3 8 Sr

should be determined.

Concept Introduction:

The general atomic symbol of an element is:

A Z X

Where A is mass number of an atom, Z is atomic number, and X is the atomic symbol of an element.

The number of protons of an atom is equal to the atomic number of an atom. For a neutral atom, the number of protons and neutrons are same whereas the mass number of an atom is total sum of number of protons and neutrons of an atom.

Explanation

The general atomic symbol of an element is:

A Z X

Where A is mass number of an atom, Z is atomic number, and X is the atomic symbol of an element.

Since,

Atomic number = Number of protons

Mass number = Number of neutrons + number of protons

So, from the symbol 90 3 8 Sr:

...

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