The relative atomic mass of copper on a newly discovered planet is .
Further explanation:
An atom is also written as , where A is the atomic mass or mass number, Z is the atomic number, and X is the letter symbol of the element.
Isotopes:
Atoms of the same element with <em>same value of atomic number</em> but <em>different value of mass numbers</em> are called isotopes. Isotopes generally have the same number of protons but the number of neutrons is different.
and are examples of isotopes. Both are the atoms of the same element carbon. The mass number of is 11 while that of is 12. But both of these have the same atomic number, i.e, 6.
Relative Atomic Mass:
It is defined as the average mass of an atom of the element compared to 1/12th of the mass of carbon-12 atom. It is represented by . The formula to calculate the relative atomic mass of an element is as follows:
Here,
is the relative atomic mass.
It is given that copper (Cu) exists in two isotopic forms, one is 63 Cu, and the other is 65 Cu. So the relative atomic mass of Cu is calculated as follows:
…… (1)
The mass of 63 Cu is 62.9300 amu.
The percentage abundance of 63 Cu is 69.15 %.
The mass of 65 Cu is 64.9200 amu.
The percentage abundance of 65 Cu is 30.85 %.
Substitute these values in equation (1).
So the relative atomic mass of copper on a newly discovered planet is 63.54 amu.
Learn more:
1. Calculate the moles of chlorine in 8 moles of carbon tetrachloride: <u>brainly.com/question/3064603
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2. Calculate the moles of ions in the solution: <u>brainly.com/question/5950133
</u>
Answer details:
Grade: Middle School
Subject: Chemistry
Chapter: Mole Concept
Keywords: percentage abundance, 63 Cu, 65 Cu, 62.9300 amu, 64.9200 amu, 30.85 %, 69.15 %, 63.54 amu, copper, isotopes, carbon-12, Ar, Cu.