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Interpretation : The statement I and II are true or false is to be decided and check whether statement II is the explanation for statement I.
Concept Introduction : Atoms that have various numbers of neutrons and different masses but the same number of protons are called isotopes. There can be many isotopes for an element of an atom.
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Answer to Problem 7STP
Statements I is true while statement II is false.
Explanation of Solution
The element that has a variable number of neutrons and mass number but the similarity in the number of protons are isotopes.
Because the nuclei of an element's isotope contain a variable number of neutrons, the isotopes of that element have distinct atomic masses.
The weighted average mass of the atoms in a naturally occurring sample of an element is its
Because of the shift in relative
Each isotope of the element has the same number of protons, hence, there is no change.
Chapter 4 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
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