Answer (C) Magnesium. Explanation The atomic number of beryllium is 4 and its mass is 9. The atomic number of sodium (Na) is 11 and its mass is 23. The atomic number of aluminum (Al) is 13 and the mass number is 27. Magnesium ( 12 Mg) naturally occurs in three stable isotopes, 24 Mg, 25 Mg, and 26 Mg. The most stable isotope of magnesium is 24 Mg and the least stable one is 26 Mg. So, the correct answer is (C) Magnesium.

2nd Edition

ISBN: 9781464142314

Author: Angelica M. Stacy

Publisher: W. H. Freeman

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Question

Chapter U1, Problem 11STP

Interpretation Introduction

Interpretation:

Based on the given information, the identity of the elements needs to be identified.

Concept introduction:

The elements are arranged in the periodic table in increasing atomic number. All of these elements show numerous other trends and the periodic law and table is used to explain their physical, chemical, and atomic properties.

Expert Solution & Answer

Answer to Problem 11STP

Explanation of Solution

The atomic number of beryllium is 4 and its mass is 9. The atomic number of sodium (Na) is 11 and its mass is 23. The atomic number of aluminum (Al) is 13 and the mass number is 27.

Magnesium (¹²Mg) naturally occurs in three stable isotopes, ²⁴Mg, ²⁵Mg, and ²⁶Mg. The most stable isotope of magnesium is ²⁴Mg and the least stable one is ²⁶Mg.

So, the correct answer is (C) Magnesium.

Chapter U1, Problem 10STP

Chapter U1, Problem 12STP

Chapter U1 Solutions

Living by Chemistry

Ch. U1.1 - Prob. 1TAI Ch. U1.1 - Prob. 1E Ch. U1.1 - Prob. 2E Ch. U1.1 - Prob. 3E Ch. U1.1 - Prob. 4E Ch. U1.1 - Prob. 5E Ch. U1.1 - Prob. 6E Ch. U1.1 - Prob. 7E Ch. U1.1 - Prob. 8E Ch. U1.2 - Prob. 1TAI

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