Atomic Structure
What are the building blocks of atoms?
What is an isotope?
An isotope is a variant of an element with the same number of protons but a different number of neutrons.
What makes the electric force more repulsive?
The primary reason for the repulsive electric force between protons in an atom's nucleus is their like charges.
What is the techonology we use to date things 50000 years old or less?
In radiometric dating, the common technology used to determine the age of organic substances less than about 50,000 years old is carbon-14 dating.
If the half life of polonium is 1 year and you start with 400 grams of it how much would you have left after 2 years.
After 2 half-lives of Polonium-210, 100 grams would remain.
What is a nucleon?
A nucleon is a particle found in the nucleus of an atom, referring to both protons and neutrons.
Compare Isotopes of Toyota Camry? Corolla, Avalon etc.
Toyota Corolla, Toyota Camry, Prius, Highlander are all the SAME model but DIFFERENT versions.
What keeps the nucleus of the atom held together?
The nucleus of an atom avoids ripping itself apart despite the repulsive electric force between protons by the strong nuclear force, which is stronger at short distances.
Why does the proportion of Carbon in the atomosphere remain constant?
The proportion of carbon-14 in the atmosphere remains relatively constant for tens of thousands of years due to a balance between production and decay rates.
If the wooden artifact has gone through 1 half life and one half life is 5730 years. How old is the wooden artifact?
The approximate age of the wooden artifact is about 5,730 years.
What is the atomic mass number?
How does Carbon-14, Carbon-12, Carbon-13 compare?
They are isotopes! Different versions of the same elements!
When does the strong nuclear force overcome electric force?
The strong nuclear force becomes effective in overcoming the electric force between nucleons at a distance of about 1 femtometer.
What happens to Carbon - 14 after 5730 years have passed?
After 5,730 years, the proportion of carbon-14 atoms in a sample halves.
If the half life of substance Y is 3 hours and it went through 6 hours and you started out with 100 grams of substance Y how much would remain?
After 6 hours, 25 grams of substance Y would remain.
What does the atomic mass number tell us?
The atomic mass number represents the total number of protons and neutrons in an atom's nucleus.
What is the main difference between heavy water and regular water?
Heavy Water has a weird and rare hydrogen isotopes with an extra neutron!
What is the purpose of the SN force?
It holds the atom together.
In radiometric dating, what is the common technology used to determine the age of organic substances less than about 50,000 years old?
Carbon -14 Radioactive Dating
Lets say you started out with 50 grams of TC-99m and the half life is 12 hours. If 12 hours have passed how much would you have left?
After 12 hours, 25 grams of Tc-99m would remain.
What does the protons of a nucleus tell us?
What do you call different versions of the same element?
ISOTOPES!
What happens if you break bonds in inside the nucleus?
You release enormous amounts of energy (Nuclear Fission).
Why does the proportion of carbon-14 in the atmosphere remain relatively constant for tens of thousands of years?
Because it tends to break down and repair at a constant rate.
The decay of a radioactive substance follows an exponential ________.
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