Atomic Structure
Dalton based his theory on the work of this Greek philosopher.
Who is Democritus?
The first step in the scientific method.
What is Ask a Question?
This factor is the measured variable in an experiment.
What is the dependent variable?
He discovered the dense nucleus.
Who was Rutherford?
The positively charged particle in an atom.
What is a proton?
According to Dalton, atoms cannot be created, destroyed, or _________________.
What is subdivided?
The step of the scientific method where you test your hypothesis.
What is the Experiment?
This is the reference group for comparison in an experiment.
What is the control group?
He proposed the "Plum Pudding" model.
Who was J.J. Thomson?
According to Dalton, atoms of the same element are ________________.
What is identical?
The step of the scientific method where you present your experiment, observations, and conclusions to others.
What is Share Results?
This is the factor that the scientist changes in an experiment.
What is independent variable?
He believed electrons orbited the nucleus on pre-determined tracks.
Who was Niels Bohr?
Atoms are the smallest, __________________ unit of matter.
What is indivisible?
The step of the scientific method where you predict a possible answer to a problem or a question.
What is a hypothesis?
In a hypothesis, this variable comes after the "then".
What is the dependent variable?
He discovered the neutron.
Who was James Chadwick?
This particle has a mass of 0.00055 amu.
What is an electron?
In chemical reactions, atoms are ______________, separated, or rearranged.
What is combined?
There is ____ independent variable, but there can be ______ dependent variables.
What is 1 independent variable and many dependent variables?
He predicted electrons exist in a multitude of overlapping orbitals we call the electon cloud.
Who was Schrodinger?