Counting Atomic Parts
Test AH (30min)
Name: ______________________________________________
period: 1 2 3 4 5 6 7 8
Part I: Solve the following problems. Show dimensional analysis and use correct units in your answer to
receive full credit.
1. A container has 452.0 grams of argon in it. How many moles is this?
2. You are asked to use 2.6 moles of aluminum in a lab. What mass should you weigh?
3. You have silver earrings that weigh 2.02 grams. How many atoms of silver are there?
4. Natural copper samples are composed of 69% copper-63 and 31% copper-65. Calculate the
relative atomic mass of copper.
Part II: Answer the following questions about protons, neutrons and electrons. Write your answer on
the line in front of the question.
_______________ 1. How many neutrons does the calcium-42 isotope have?
_______________ 2. How many electrons does the carbon-12 ion have if it has a charge of +4?
_______________ 3. How many protons does the oxygen-18 ion have if it has a charge of -2?
_______________ 4. Write the nuclear symbol for the following species: 10 electrons, 12 protons, 14
neutrons.
_______________ 5. Name the species given in number 4 above.
Counting Atomic Parts
Test BH (30min)
Name: ______________________________________________
period: 1 2 3 4 5 6 7 8
Part I: Solve the following problems. Show dimensional analysis and use correct units in your answer to
receive full credit.
1. A container has 254.0 grams of aluminum in it. How many moles is this?
2. You are asked to use 6.2 moles of copper in a lab. What mass should you weigh?
3. You have gold earrings that weigh 2.02 grams. How many atoms of gold are there?
4. Natural potassium samples are composed of 93% potassium-39 and 7% potassium-41. Calculate
the relative atomic mass of potassium.
Part II: Answer the following questions about protons, neutrons and electrons. Write your answer on
the line in front of the question.
_______________ 1. How many neutrons does the carbon-12 isotope have?
_______________ 2. How many electrons does the oxygen-18 ion have if it has a charge of -2?
_______________ 3. How many protons does the ion calcium-42 have if it has a charge of +2?
_______________ 4. Write the nuclear symbol for the following species: 18 electrons, 15 protons, and 16
neutrons.
_______________ 5. Name the species given in number 4 above.
Counting Atomic Parts
Test CH (30min)
Name: ______________________________________________
period: 1 2 3 4 5 6 7 8
Part I: Solve the following problems. Show dimensional analysis and use correct units in your answer to
receive full credit.
1. A container has 524.0 grams of nitrogen in it. How many moles is this?
2. You are asked to use 3.6 moles of zinc in a lab. What mass should you weigh?
3. You have nickel earrings that weigh 2.02 grams. How many atoms of nickel are there?
4. Natural chlorine samples are composed of 75.77% chlorine-35 and 24.23% chlorine-37. Calculate
the relative atomic mass of chlorine.
Part II: Answer the following questions about protons, neutrons and electrons. Write your answer on
the line in front of the question.
_______________ 1. How many neutrons does the oxygen-18 isotope have?
_______________ 2. How many electrons does the carbon-12 ion have if it has a charge of +4?
_______________ 3. How many protons does the calcium-42 ion have if it has a charge of +2?
_______________ 4. Write the nuclear symbol for the following species: 10 electrons, 9 protons, 10 neutrons.
_______________ 5. Name the species given in number 4 above.
Counting Atomic Parts
Test D(30min)
Name: ______________________________________________
period: 1 2 3 4 5 6 7 8
Part I: Solve the following problems. Show dimensional analysis and use correct units in your answer to
receive full credit.
1. A container has 452.0 grams of argon in it. How many moles is this?
2. You are asked to use 2.6 moles of aluminum in a lab. What mass should you weigh?
3. You have silver earrings that weigh 2.02 grams. How many atoms of silver are there?
4. Natural copper comprises 69% Copper-63 and 31% Copper-65. Calculate the relative atomic mass
of copper.
Part II: Answer the following questions about protons, neutrons and electrons. Write your answer on
the line in front of the question.
_______________ 1. How many neutrons does the calcium-42 isotope have?
_______________ 2. How many electrons does the carbon-12 ion have if it has a charge of +4?
_______________ 3. How many protons does the oxygen-18 ion have if it has a charge of -2?
_______________ 4. Write the nuclear symbol for the following species: 10 electrons, 12 protons, 14
neutrons.
_______________ 5. Name the species given in number 4 above.