Atomic Structure
What charge does a proton have?
Positive
What is the atomic number of oxygen?
8
What is an isotope?
Same protons, different neutrons
What is the most penetrating radiation type?
Gamma
Which isotope is used in smoke detectors?
Americium - 241
Where is the nucleus located in an atom?
Centre
What does the atomic number represent?
Number of Protons
Which isotope of carbon is radioactive?
Carbon-14
Which radiation is made of 2 protons and 2 neutrons?
Alpha
What isotope is used in radiotherapy for cancer?
Cobalt - 60
Which subatomic particle has no charge?
Neutron
Which side of the table are metals found on?
Left
Do isotopes of an element have the same chemical properties?
Yes
What is the half-life of carbon-14?
5700 years
What type of dating is used for ancient fossils?
Radiocarbon dating
Who discovered the nucleus using the gold foil experiment?
Rutherford
What does the atomic mass represent?
Protons + Neutrons
What type of decay turns carbon-14 into nitrogen?
Beta
What fraction remains after 3 half-lives?
1/8
What element is used as fuel in nuclear power plants?
Uranium
Name the atomic model that replaced the plum pudding model.
Nuclear Model
163
Name the isotope with 35 protons and 45 neutrons.
Bromine - 80
What radiation type can be stopped by paper?
Alpha
What property makes barium-137 safe in diagnostics?
Short half-life