Types of Radiation
Which type of Radiation has 2 protons and 2 nuetrons?
Alpha particle
What is half-life?
Time it takes for half of a substance to decay.
What must be balanced in nuclear equations?
Mass number and atomic number.
What is an unstable atom called?
Radioactive
What is radioactive decay used for when treating cancer patients?
Radiation therapy
Which type of Radiation is a high-energy electron?
Beta particle
If you start with 100g and one half-life passes, how much remains?
50g
What happens to the atomic number in alpha decay?
Decreases by 2
What is the center of an atom called?
Nucleus
What method uses radioactive decay to determine the age of fossils?
Carbon dating
Which type of radiation has no mass and no charge?
Gamma radiation
After two half-lives, how much of 100g remain?
25g
What happens to the atomic number in beta decay?
Decreases by 1
What is radiation?
Energy or particles released from the nucleus.
What household device uses a small amount of radioactive material to detect smoke
Smoke detectors
Which radiation is the MOST penetrating?
Gamma
Does half-life change depending on the amount?
No
What is emitted in gamma decay?
Energy (gamma ray)
What is decay?
Breakdown of an unstable nucleus.
What process uses radioactive materials to produce electricity in power plants?
Nuclear power
Which radiation can be stopped by paper?
Alpha
If a substance has a half-life of 10 years, how long for 1/4 to remain?
20 years
What happens to mass number in beta decay?
Stays the same
What is an isotope?
Same element, different number of nuetrons
What medical technique uses radioactive substances to track processes inside the body?
Radioactive tracers