Atoms
Which part of the atom has a negative charge?
Electron
If you have a element that has 33 protons and 42 neutrons, what is your atomic number?
33, because your atomic number is how many protons in the nucleus.
What particle is not part of the atomic mass?
Electron, due to it being so small in comparison to the proton and neutron.
What about an atom makes it decay?
If it is unstable
When two atoms fuse together to form a heavier atom, what is this known as?
Fusion
If you had an atom that had 8 protons and 9 neutrons, how many electrons would you need to have a neutral atom?
8 electrons so that the positive charges of the protons will be balanced out.
Carbon has a mass number of 12 and 6 neutrons. What is the atomic number?
6
How do you find the mass number of an element?
Adding the protons and neutrons
What is always released during radioactive decay regardless of type of decay?
Energy
What is Fission?
The splitting of the atomic nucleus into parts
What is a term defined as a substance that cannot be broken down chemically into a simpler substance
Element
What does the electron cloud model describe?
A. the group of protons that are in the nucleus
B. location where an electron has the highest probability of being found
C. the negative charge of the electron
D. the neutron orbital
B. location where an electron has the highest probability of being found
In the nucleus of the atom, you have protons and neutrons, what are they composed of?
Quarks
What is a half-life?
the amount of time it takes for half of a radioactive substance to decay
Which process powers the sun, and which one is used in nuclear power plants currently?
Fusion - Sun
Fission - Nuclear Power Plants
What is the difference between different isotopes of an element?
They have different masses due to having different numbers of neutrons.
What does the atomic number determine about the element besides the number of protons?
What type of element it is. If you increase the number of protons, you change the element.
What is the importance of Neutrons in the Nucleus?
Protons are inclined to repel each other due to the electromagnetic force. Neutrons keep protons apart because if they get too close, they will push each other away. So, neutrons help keep the nucleus together.
Why does radioactive decay occur?
A. Nuclear forces disintegrate protons.
B. The electric force causes electrons to be released.
C. Nuclear forces absorb protons and release energy.
D. The electric force and nuclear forces are in opposition to each other.
D. The electric force and nuclear forces are in opposition to each other.
What are two outcomes of Fusion?
A larger (heavier) atom and a lot of energy
What is the importance of proton, neutrons and electrons of the atom?
The number of protons determines the element
The number of protons and electrons determine the charge of the atom
The number of protons and electrons determines the mass of the element.
All of this could be said to determine the properties of an atom
There were different atomic models as time progressed. What is the name of the model that was said to have a certain number of electrons trapped in a mass of positive charge?
Many names:
Plum pudding Model
Raisin Bread Model
Chocolate chip cookie model
To find the weighted average atomic mass of an element you multiply the different isotopes by what value?
Percent abundance
If the half-life of an element is 500 years, old will an object be if there is only 12.5% of the element left?
50% - 1 half-life = 500 years
25% - 2 half-lives = 1000 years
12.5% - 3 half-lives = 1500 years
Give two similarities between Fusion and Fission.
1. They are both Nuclear Reactions (changing the nucleus)
2. They both release a large amount of energy
3. They occur naturally in the right conditions
4. They can be used for nuclear weapons.