Exam Prep Flashcards
What is the half life of Technetium-99m
6 hours
What is a main isotope used in medicine
Technetium 99m
What element does Technetium 99m come from
Molybdenum
What element does the thyroid like
Iodine
What are isotopes used for in medicine
Diagnostics, injected, CT scan detects radiation
Firing radiation at cancer cells
What happens if electricity is run through noble gases
Light
What are the most reactive non metals
Halogens
What is the most reactive element
Francium
What does ductile mean
It can be drawn into a wire
What are some properties of metals
Shiny, ductile, solid at room temperature
What are some properties of non metals
Dull, gas at room temperature
Who was the first person in the history of atomic theory
Democritus
What did Democritus do
Had the original idea of indivisible atomos
Who was the second person in the history of atomic theory
John Dalton
What did John Dalton do
Atoms of a particular element differ from other elements
Who was the third person in the history of atomic theory
J.J. Thomson
What did J.J. Thomson do
Discovered electrons, plum pudding model
Who was the fourth person in the history of atomic theory
Ernest Rutherford
What did Ernest Rutherford do
Fire positively charged alpha particles at gold foil. Atom is mostly empty space with most of the mass in the nucleus
Who was the fifth person in the history of atomic theory
Niels Bohr
What did Niels Bohr do
Electrons move around nucleus in orbits of fixed sizes and energies. We use the Bohr model
Who developed the current periodic table, organising elements by atomic number
Demetri Mendeleev
What bond is non metal to metal
Ionic
What is the strongest bond
Ionic
What bond is non metal to non metal
Covalent
What are the rows on the periodic table called
Periods
What are the columns on the periodic table called
Groups
What are elements with similar properties called
Families
Where do you find the most reactive metals
Bottom left
How are rows organised
According to increasing atomic number
How are groups organised
According to size and electrons in outer shell
What does alpha decay look like
A helium nucleus - 2 protons, 2 neutrons
What does beta decay look like
An electron, +1 atomic number
