Explanation The mass number of an atom is written as a superscript. The atomic number of an atom is written as a subscript. The atomic number is the number of protons in the nucleus of an element. There cannot be 2 or more elements with the same atomic number. The element 80 202 X has a mass number of “202”. The atomic number of X is “80” The atom has 80 protons. The element that has 80 protons is Mercury The element 78 195 X has a mass number of “195”. The atomic number of X is “78” The atom has 78 protons

8th Edition

ISBN: 9780135204634

Author: Robinson

Publisher: PEARSON

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Chapter 2, Problem 2.107SP

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To determine:

Identify an element based on its atomic number.

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Chapter 2, Problem 2.106SP

Chapter 2, Problem 2.108SP

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Chapter 2 Solutions

CHEMISTRY-MASTERINGCHEMISTRY W/ETEXT

Ch. 2 - An element is a shiny, silver-colored solid at...Ch. 2 - Prob. 2.2A Ch. 2 - PRACTICE 2.3Compounds A and B are colorless gases...Ch. 2 - APPLY 2.4If the chemical formula of compound A in...Ch. 2 - PRACTICE 2.5The gold foil that Rutherford used in...Ch. 2 - Prob. 2.6A Ch. 2 - PRACTICE 2.7The isotope 3475Se is used medically...Ch. 2 - APPLY 2.8Element X is toxic to humans in high...Ch. 2 - PRACTICE 2.9Copper metal has two naturally occur-...Ch. 2 - Prob. 2.10A

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Identify an element based on its atomic number .

To determine: Identify an element based on its atomic number.

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Chapter 2 Solutions

To determine:

Identify an element based on its atomic number.