Parts of the Atom
What is the positive particle of the atom called?
Proton
What is the atomic number for carbon-14?
6
What type of decay is represented by a helium nuclei?
Alpha
If we start with 100 grams of a radioactive substance how much is left after 2 half lives?
25 grams
When atoms of the same element have different neutrons and therefore different mass numbers, we call these atoms...
Isotope
What is the neutral particle of the atom called?
Neutron
What is the mass number of nitrogen-15?
15
Which type of decay is represented by a positive electron?
positron emission
If we start with 80 grams of a radioactive substance with a half life of 10 seconds. How much would be left after 5 seconds?
20 g
The time it takes for one half of a sample to decay
half-life
What is the negative particle of the atom called?
Electron
The atomic number tells us the number of ___________ and __________.
protons and electrons
Write a decay equation for the beta decay of carbon-14.
...
What percentage (or fraction) of a sample will be left after 6 half lives?
1.56% of 1/64
This is the splitting of unstable atoms and releases a ton of energy
nuclear fission
What do we call the center of the atom?
Nucleus
How many neutrons are in a Lithium-7?
4
Write the equation for the alpha decay of plutonium-244.
...
If you start with a 5 gram sample and you have 1.25 grams left after 6 hours, what is the half life?
3 hours
Any atom containing an unstable nucleus is called a...
radioisotope
What subatomic particles are in the nucleus?
Protons and Neutrons
How many protons, neutrons, and electrons are in a chlorine-35?
17 p, 17 e, 18 n
Write the equation for the electron capture of Nitrogen-15.
...
If you start with 100 grams and you end with 6.25 grams. If the half life is 6 minutes, how much time has gone by?
24 minutes
This is the combing of smaller atoms in order to form a larger more stable nucleus.
nuclear fusion