What happens to the atom as the number of neutrons increases?
Question 3 options:
As the number of neutrons increases,
the mass increases, AND
the atom becomes stable
As the number of neutrons increases,
the mass decreases, AND
the atom becomes unstable.
As the number of neutrons increases,
the mass increases, AND
the atom becomes unstable
As the number of neutrons increases,
the mass decreases, AND
the atom becomes stable
As the number of neutrons increases, the mass of the atom increases, AND the atom becomes unstable.
How does stability relate to abundance in nature?
Question 4 options:
Unstable atoms are found in high percentages.
The more unstable an atom is, the less abundant it is.
The more stable atoms are less abundant.
Stable atoms are only found in trace amounts.
The more stable an atom is, the less abundant it is.
Which of the following would be a correct definition of average atomic mass?
Question 5 options:
number of protons and neutrons in an atom
the mass on a balance of a sample of an element
a weighted average mass of the atoms of a naturally occurring sample of the element
number of neutrons in an atom
A weighted average mass of the atoms of a naturally occurring sample of the element.
Comparing the isotope data you collected for Part 1 and Part 2, what conclusion can you make about percent abundance in nature (from part 1) and percent composition (from part 2)?
Question 6 options:
The percent abundance has nothing to do with the percent composition.
The percent abundance is lower than the percent composition.
The percent abundance is the same as the percent composition.
The percent abundance in nature is higher than the percent composition.
The percent abundance is the same as the percent composition.
What relationship do you see in your data between percent composition and average atomic mass?
Question 7 options:
The average atomic mass is closer to the mass of the isotope with the lower percent composition.
The average atomic mass is closer to the mass of the isotope with the higher percent composition.
The percent composition and the average atomic mass change independently of one another.
The average atomic mass is not affected by the percent composition.
The average atomic mass is closer to the mass of the isotope with the higher percent composition.
Carbon has an average atomic mass of 12.0111 amu as given on the periodic table.
Which isotope do you think is most abundant: Carbon-12 or Carbon-13? Use the Isotopes portion of the lab simulation to help you if needed.
Question 8 options:
Carbon-12 is the most abundant since the average atomic mass is closer to 12.00000 amu than 13.00335 amu shown on the balance in the isotopes section of the simulation.
Carbon-13 is the most abundant since the average atomic mass is closer to 13.00335 amu than 12.00000 amu shown on the balance in the isotopes section of the simulation.
The two isotopes have equal impact on the average atomic mass.
There is no way to tell from the information given.
Carbon-12 is the most abundant since the average atomic mass is closer to 12.00000 amu than 13.00335 amu shown on the balance in the isotopes section of the simulation.
Bromine's two major isotopes are bromine-79 and bromine-81. The average atomic mass for bromine on the periodic table is 79.904 amu.
Given this information, what can you conclude about the percent composition of the isotopes in nature?
Question 9 options:
Other bromine isotopes have a greater effect on the average atomic mass.
Bromine-79 is affecting the average atomic mass more than bromine-81.
Neither isotope has a greater effect than the other.
Bromine-81 is affecting the average atomic mass more than bromine-79.