Isotopes Flashcards
What are isotopes?
Different forms of the same element with the same number of protons but different number of neutrons.
What do isotopes have in common?
They have the same atomic number.
What is the difference between carbon-12 and carbon-13?
Carbon-12 has 6 neutrons, while carbon-13 has 7 neutrons.
What does relative atomic mass account for?
It takes isotopes into account.
What is the formula for relative atomic mass (A)?
A = sum of (isotope abundance × isotope mass number) / sum of abundances of all the isotopes.
How is the relative atomic mass of an element determined if it has multiple isotopes?
It is the average of the mass numbers of all the different isotopes, weighted by their abundances.
Fill in the blank: The relative atomic mass of an element with only one isotope is the same as its _______.
mass number.
What is the relationship between isotopic abundances and relative atomic mass?
Isotopic abundances are used to calculate the relative atomic mass.
True or False: The relative atomic mass can be a whole number.
False; it might not be a whole number if there are multiple isotopes.
What is the significance of Dmitri Mendeleev in chemistry?
He created the periodic table and organized elements based on their properties.
What is the relative atomic mass of boron given its isotopes and abundances?
Relative atomic mass = 10.8.
What does the term ‘isotopic abundance’ refer to?
The different quantities in which isotopes of an element occur.
