Atom Chart
I have 6 protons, 6 electrons, and a mass number of 12. What is my atomic number and how many neutrons do I have?
Atomic number-6 Neutrons-6
I have 11 protons, 11 electrons, and a mass number of 23. How many neutrons do I have and what is my atomic number?
Neutrons-12 Atomic number-11
If an atom has a mass number of 53 and an atomic number of 26, how many neutrons does it have? Include a formula that explains your answer.
Mass number-atomic number=27 neutrons
A certain element has a half-life of 20 years. A scientist starts with 100g of this element.
How many grams remain after 20 years?
50g
I have 0 neutrons, 1 electron, an atomic number of 1. What is my mass number and how many protons do I have?
Protons-1 Mass number-1
I have 12 protons, neutrons, and electrons. What is my atomic number? my mass number?
Atomic number-12 Mass number-24
The isotopes of carbon (carbon-12, carbon-13, carbon-14) have different mass numbers. Each isotope has 6 protons. Explain how you can determine the number of neutrons in each isotope.
Subtract the atomic number (6) from the mass number.
A certain element has a half-life of 20 years. A scientist starts with 100g of this element.
How many grams remain after 40 years?
25g
I have 10 neutrons, 9 electrons, and an atomic number of 9. How many protons do I have and what is my mass number?
Protons-9 Mass number-19
According to the atom chart, which two atoms are isotopes of one another?
Atoms A and D
How is americium-241 used in smoke detectors?
It undergoes transmutation to neptunium by ejecting alpha particles- air in the unit conducts electricity because of the presence of the alpha particles. Once the flow is broken by smoke, the alarm is set off.
A certain element has a half-life of 20 years. A scientist starts with 100g of this element.
How many half-lives are in a 100-year span? How many grams of the sample would remain after 100 years?
5 half-lives 3.125g
I have 8 neutrons, 6 electrons, and an atomic number of 6. How many protons do I have and what is my mass number?
Protons-6 Mass number-14
According to the chart, which atom could not possibly emit an alpha particle?
Atom B
What is the half-life of iodine-131?
8 days
I have 17 protons, 17 electrons, and a mass number of 35. How many neutrons do I have and what is my atomic number?
Neutrons-18 Atomic number-17
According to the chart, which two atoms could be the "before and after" of an alpha ejection?
Atoms C and G
How long is the half-life of carbon-14?
5,730 years