Bohr Model/Lewis Structure
The center of the atom that contains neutrons and protons is known as the
Nucleus
When an element becomes an ion, it gains or loses?
Electrons
The sun is powered by what process?
nuclear fusion.
If an element undergoes alpha decay, what has been emitted?
A Helium Nucleus
What is one disadvantage of nuclear power?
It is potentially dangerous
If you have an isotope of carbon-14, what is its mass?
14
An element is different from an isotope in that it has a different number of _____ than normal.
Nuetrons
What makes elements radioactive?
Too many Neutrons and Protons
If you drink enough coke zero to put 48mg of caffeine in your system, and caffeine has a Half-Life of 5 hours, how many hours will it take to only have 3 mg in your body?
20 Hours
What is one advantage of nuclear power?
It does not contribute to greenhouse emissions
How many valence electrons does Lithium have?
1
If you have an isotope of carbon, what is likely its mass?
12
If an element undergoes beta decay, what has been emitted?
electron
A patient is given 126mg of a medication which has a Half-Life of 3 hours, how much medication is remaining after 9 hours?
Around 16 mg
What was the name of the man that accompanied the . Nuclear Power Plants in North Carolina run off of what process?
Nuclear power plants in North Carolina (and everywhere else today) use nuclear fission — splitting large unstable nuclei (like uranium-235) into smaller nuclei, releasing energy that is converted into electricity.
How many valence electrons does Neon have?
8
If you have an isotope of carbon-12, what is its mass?
12
Enumerate the different types of radiation and state the particle emitted.
Alpha: Helium nucleus (2p + 2n)
Beta: Electron
Gamma: Photon (energy only)
A patient is given 100mg of a medication which has a Half-Life of 48 hours, how much medication is remaining after 96 hours?
WHAT IS THE DIFFERENCE BETWEEN FUSION AND FISSION?
Fission = splitting heavy atoms (used in power plants).
Fusion = joining light atoms (powers the Sun, future energy source).
Given atoms of sodium that lost their valence electron, what charge do they now have?
1+
Explain what an Isotope is.
An isotope is a form of an element that has the same number of protons (so it’s the same element) but a different number of neutrons in the nucleus.
Given the choice, what type of radioactive decay would you choose to be hit with if you wanted the least amount of effects?
Alpha Decay
Given Carbon-14 which has a Half-Life of 5730 years, how long will it take for less than 10% of the substance to be remaining?
A. 5730 years B. 22,920 years C. 17,190 years D. 11,460 years
B. 22,920 years
how do you identify the valence electron of an element?
Main groups: Use the group number.
Check the outer shell in electron configuration.