
Concept explainers
Interpretation:
The number of protons and neutrons in each of the given isotope needs to be compared.
Concept introduction:
Lutetium is a rare-earth element that can be used to speed up to the

Answer to Problem 12STP
Lutetium − 176 has 105 neutrons and
Explanation of Solution
Given the element is lutetium and both isotopes has same proton numbers. Difference between the mass number and atomic number is the neutron number of any isotope. Lutetium − 175 has atomic number 71 and mass number 175. Lutetium − 176 has 105 neutrons and atomic number is 71. Lutetium − 175 has 104 neutrons and atomic number is 71.
Difference between the mass number and atomic number is the neutron number of any isotope. Lutetium − 175 has 104 neutrons and atomic number is 71. Lutetium − 176 has 105 neutrons and atomic number is 71.
Chapter 7 Solutions
Glencoe Chemistry: Matter and Change, Student Edition
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