Concept explainers
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
Answer to Problem 11STP
(C) Magnesium.
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 Solutions
Living by Chemistry
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