Science grade 9 Flashcards
What is an isotope
An atom that exists in different forms
Three different types of Radioactive/ nucleus decay
Alpha, Beta and Gamma
What is a Half-life
How long it takes to decay half of the amount of an isotope
How to determine amount of Neutrons in an element
Atomic Mass - Atomic Number = No of Neutrons in an element
How many electrons in an electron shell. 1,2 and 3
2,8 and 8
Why can isotopes emit radioactivity?
Since isotopes are unbalanced elements. (With mass changing and therefore affecting the original element) Which can make them unstable which can lead to them being radioactive.
Explain the law of conservation of Mass with an example
An example of the law of conservation of mass is the b urning of an object. If the smoke, soot and ash from the chemical reaction is collected at the end it would weigh the same before it was burnt. This shows and proves the Law of Conservation of Mass.
Define an atom
Smallest particle of matter
What is an element, a molecule, a compound
An element is made up of one type atom, a molecule is made up of two or more of the same atoms a compound is made up of two or more different atoms,
Charge and mass of protons, neutron and electrons
Protons are positive and have a mass of 1, neutrons are neutral and have a mass of 1, electrons are negative and have a mass of 1/1840
Group 1,2,7 and 8 names
Alkali metals, Alkaline earth metals, Halogens, Noble gases
Safety measures involved in the medical use of radioactive isotopes.
Minimising exposure, PPE (Personal protective equipment.), safe storage and disposal.
Ethical considerations involved in the medical use of radioactive isotopes
informed consent, equity and access, storage and disposal
