Question
What is average atomic mass?
Group of answer choices
The weighted average of all isotopes of an element based on their percent abundance
The number of protons in the most abundant isotope
The sum of the atomic numbers of all isotopes
Flag question: Question 2
Question 21 pts
Why must we use percent abundance when calculating average atomic mass?
Group of answer choices
To give more influence to isotopes that occur more frequently
To eliminate isotopes with low mass
To determine which isotope is radioactive
Flag question: Question 3
Question 31 pts
In a sample of 10 atoms, 7 are isotope A and 3 are isotope B. What is the percent abundance of isotope A?
Group of answer choices
30%
70%
50%
Flag question: Question 4
Question 41 pts
Which formula correctly calculates average atomic mass?
Group of answer choices
Subtract the mass of each isotope from its abundance
(mass of isotope 1 + mass of isotope 2) ÷ 2
(abundance × mass) for each isotope, then add them together
Flag question: Question 5
Question 51 pts
What are the two isotopes used in the boron simulation?
Group of answer choices
Boron-10 and Boron-11
Boron-9 and Boron-10
Boron-10 and Boron-12
Flag question: Question 6
Question 61 pts
In the boron simulation, if there are 7 atoms of boron-11 and 2 atoms of boron-10 in a sample, what is the percent abundance of boron-11? (Round your answer to the closest whole number)
Group of answer choices
88%
70%
22%
78%
Flag question: Question 7
Question 71 pts
How does the simulation model average atomic mass?
Group of answer choices
It allows users to change the number of isotopes and measure their masses
It changes proton numbers to balance isotope mass
It shows real-time electron movement
Flag question: Question 8
Question 81 pts
What happens to the average atomic mass when the number of heavier isotopes increases in a sample?
Group of answer choices
It becomes a whole number
It stays the same
It decreases
It increases
Flag question: Question 9
Question 91 pts
Can you measure the mass of a single atom with a normal laboratory scale like in the simulation?
Group of answer choices
Yes, if you use a sensitive enough scale
Yes, if the atom is stable
No, because atoms do not have mass
No, atoms are too small to weigh individually with standard lab equipment
Flag question: Question 10
Question 101 pts
Why is the average atomic mass on the periodic table often a decimal instead of a whole number?
Group of answer choices
Because neutrons are sometimes shared between atoms
Because isotopes have fractional protons
Because it is a weighted average of all naturally occurring isotopes
Because electrons are included in the total
Group of answer choices
The weighted average of all isotopes of an element based on their percent abundance
The number of protons in the most abundant isotope
The sum of the atomic numbers of all isotopes
Flag question: Question 2
Question 21 pts
Why must we use percent abundance when calculating average atomic mass?
Group of answer choices
To give more influence to isotopes that occur more frequently
To eliminate isotopes with low mass
To determine which isotope is radioactive
Flag question: Question 3
Question 31 pts
In a sample of 10 atoms, 7 are isotope A and 3 are isotope B. What is the percent abundance of isotope A?
Group of answer choices
30%
70%
50%
Flag question: Question 4
Question 41 pts
Which formula correctly calculates average atomic mass?
Group of answer choices
Subtract the mass of each isotope from its abundance
(mass of isotope 1 + mass of isotope 2) ÷ 2
(abundance × mass) for each isotope, then add them together
Flag question: Question 5
Question 51 pts
What are the two isotopes used in the boron simulation?
Group of answer choices
Boron-10 and Boron-11
Boron-9 and Boron-10
Boron-10 and Boron-12
Flag question: Question 6
Question 61 pts
In the boron simulation, if there are 7 atoms of boron-11 and 2 atoms of boron-10 in a sample, what is the percent abundance of boron-11? (Round your answer to the closest whole number)
Group of answer choices
88%
70%
22%
78%
Flag question: Question 7
Question 71 pts
How does the simulation model average atomic mass?
Group of answer choices
It allows users to change the number of isotopes and measure their masses
It changes proton numbers to balance isotope mass
It shows real-time electron movement
Flag question: Question 8
Question 81 pts
What happens to the average atomic mass when the number of heavier isotopes increases in a sample?
Group of answer choices
It becomes a whole number
It stays the same
It decreases
It increases
Flag question: Question 9
Question 91 pts
Can you measure the mass of a single atom with a normal laboratory scale like in the simulation?
Group of answer choices
Yes, if you use a sensitive enough scale
Yes, if the atom is stable
No, because atoms do not have mass
No, atoms are too small to weigh individually with standard lab equipment
Flag question: Question 10
Question 101 pts
Why is the average atomic mass on the periodic table often a decimal instead of a whole number?
Group of answer choices
Because neutrons are sometimes shared between atoms
Because isotopes have fractional protons
Because it is a weighted average of all naturally occurring isotopes
Because electrons are included in the total
Answers
GPT-4o mini
Here are the answers to your questions based on the provided options:
**Question 1: What is average atomic mass?**
- **Answer:** The weighted average of all isotopes of an element based on their percent abundance
**Question 2: Why must we use percent abundance when calculating average atomic mass?**
- **Answer:** To give more influence to isotopes that occur more frequently
**Question 3: In a sample of 10 atoms, 7 are isotope A and 3 are isotope B. What is the percent abundance of isotope A?**
- **Answer:** 70%
**Question 4: Which formula correctly calculates average atomic mass?**
- **Answer:** (abundance × mass) for each isotope, then add them together
**Question 5: What are the two isotopes used in the boron simulation?**
- **Answer:** Boron-10 and Boron-11
**Question 6: In the boron simulation, if there are 7 atoms of boron-11 and 2 atoms of boron-10 in a sample, what is the percent abundance of boron-11? (Round your answer to the closest whole number)**
- **Answer:** 78%
**Question 7: How does the simulation model average atomic mass?**
- **Answer:** It allows users to change the number of isotopes and measure their masses
**Question 8: What happens to the average atomic mass when the number of heavier isotopes increases in a sample?**
- **Answer:** It increases
**Question 9: Can you measure the mass of a single atom with a normal laboratory scale like in the simulation?**
- **Answer:** No, atoms are too small to weigh individually with standard lab equipment
**Question 10: Why is the average atomic mass on the periodic table often a decimal instead of a whole number?**
- **Answer:** Because it is a weighted average of all naturally occurring isotopes
Feel free to ask if you have any further questions or need clarifications!
**Question 1: What is average atomic mass?**
- **Answer:** The weighted average of all isotopes of an element based on their percent abundance
**Question 2: Why must we use percent abundance when calculating average atomic mass?**
- **Answer:** To give more influence to isotopes that occur more frequently
**Question 3: In a sample of 10 atoms, 7 are isotope A and 3 are isotope B. What is the percent abundance of isotope A?**
- **Answer:** 70%
**Question 4: Which formula correctly calculates average atomic mass?**
- **Answer:** (abundance × mass) for each isotope, then add them together
**Question 5: What are the two isotopes used in the boron simulation?**
- **Answer:** Boron-10 and Boron-11
**Question 6: In the boron simulation, if there are 7 atoms of boron-11 and 2 atoms of boron-10 in a sample, what is the percent abundance of boron-11? (Round your answer to the closest whole number)**
- **Answer:** 78%
**Question 7: How does the simulation model average atomic mass?**
- **Answer:** It allows users to change the number of isotopes and measure their masses
**Question 8: What happens to the average atomic mass when the number of heavier isotopes increases in a sample?**
- **Answer:** It increases
**Question 9: Can you measure the mass of a single atom with a normal laboratory scale like in the simulation?**
- **Answer:** No, atoms are too small to weigh individually with standard lab equipment
**Question 10: Why is the average atomic mass on the periodic table often a decimal instead of a whole number?**
- **Answer:** Because it is a weighted average of all naturally occurring isotopes
Feel free to ask if you have any further questions or need clarifications!