Atom vocab
These particles of an atom have a positive charge.
What are the protons?
The number of protons in an atom is known as this.
What is atomic number?
Process where scientists use radioactive decay to determine how old an object is
What is radioactive dating?
The sum of the protons and neutrons in an atom is called this.
What is the mass number?
In this type of radioactive decay, the nucleus emits 2 protons and 2 neutrons (Helium) and the atom changes to a different atom.
What is alpha decay?
Negatively charged part of atom
What is an electron?
This is the force that holds protons and neutrons together in the nucleus.
What is the strong force?
An atom with a nucleus that is not stable is known as this
What is a radioactive isotope?
Carbon-14 has a mass number of 14 and an atomic number of 6. This is the number of neutrons it has.
What is 8?
A nucleus emits a high energy photon with no mass or charge.
What is gamma decay?
Part of an atom that has no charge
What is a neutron?
Atoms with the same number of protons but different numbers of neutrons are known as these
What are isotopes?
This is the time required for half of a radioactive sample to decay
What is half life?
80grams of a radioactive material goes through two half lives. How much is left?
What is 20 grams
A neutron changes into a proton and an electron.
What is beta decay?
Center of atom that contains protons and neutrons is called this
What is the nucleus?
This is how you describe the Bohr model of an atom
What are protons and neutrons in the center forming a nucleus, surrounded by electrons in different shells?
This type of radiation consists of two protons and two neutrons.
What is alpha radiation?
These are the number of protons, neutrons and electrons sodium has
What is 11 protons and electrons and 12 neutrons?
This type of radiation requires several inches of lead for shielding.
What is gamma radiation?
Atoms that have the same number of protons are called this
What is an element?
This particle has almost no Mass as compared to the other parts of an atom
What is the electron?
This type of radiation has a high speed electron emitted from the nucleus.
What is beta radiation?
If you start with 100g of a sample and the sample has a half life of 15 minutes. This is how much is left after 30 minutes.
What is 25 grams?
This type of radiation has no Mass and no charge.
What is gamma radiation?