Atomic Structure
What are the three main subatomic particles in an atom?
what are Protons,neutrons, and electrons
What is the name of the force that holds protons and neutrons together?
What happens to an unstable nucleus during radioactive decay?
It releases particles or energy to become more stable
What is Half life?
The time it takes for half a radioactive sample to decay
What determine swether a nucleus is stable or unstable?
The ratio of protons to neutrons in the nucleus.
Where are protons and neutrons located in the atom?
What is the nucleus
Which forces causes protons to repel each other?
What is the electromagnetic force?
What are the four types of radioactive decay?
Alpha, beta pos, beta neg, gamma
What symbol represents teh original amount in the half life Equation?
What is N0
Why do heavy nuclei luke uranium-238 often undergo alpha decay instead of beta decay?
They have to many protons and neutrons so releasing an alpha particles helps reduce both mass and charge.
What does the atomic number z Represent?
what is the number of protons
What particles acts as a "buffer" in the nucleus?
What are neutrons
In alpha decay what particle is released?
What is the equation for Half life?
N=N0(1/2)^t/t/2
A carbon-14 nucleus undergoes beta negative decay, what new element is formed?
Nitrogen
what is the total number of protons and neutrons called?
What is the atomic mass
Which force is responsible for radioactive decay?
What is the Weak Nuclear Force?
What is a proton?
If a sample starts with 100g and has a half life of 10 years, how much remains after 20 years?
25g
Why does gamma decay often occur after beta or alpha decay?
Because the daughter nucleus is left in an excited state and releases gamma waves to drop the energy level.
Which part of the atom takes up the most space but has the least mass?
What is the electrons/electrons cloud?
What are the four fundamental forces?
what type of decay only releases energy?
What is Gamma decay
What does a shorter half life say about the stability of a nucleus?
A nucleus of potassium decays into argon, but the mass stays the same, what occured?
Potassium underwent beta negative decay, turning a proton into a neutron.