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What is the typical radius of an atom?
1×10 power of -10m
Define concentration
Measure of how much solute is dissolved in a given amount of solvent (units: mol/L)
What is PH a measure of?
H+ concentration
What is the difference between a strong and weak acid?
strong acid = fully ionised
Weak acid = partially ionised
What is an isotope?
Atoms of the same element that have the same number of protons but a different number of neutrons
How did Dalton describe the atom?
Solid spheres that could not be broken down into smaller sub - particles
What did Thompson’s plum pudding model tell us about the atom?
A solid positive sphere with smaller negative charges spread throughout
Describe the three main conclusions from Rutherford’s gold foil experiment
Atoms are mainly empty space
Atoms have a positive central nucleus
Atoms have a dense nucleus
What did Bohr suggest?
Electrons orbit the nucleus in different energy levels or at specific distances from the nucleus
Which two other scientists conducted the gold foil experiment with Rutherford?
Geiger and Marsden