Atom Facts
This man believed that all matter was made up of extremely small particles that could not be divided.
Who was Democritus?
Dalton used this analogy to explain atoms
What is a solid sphere (or billiard ball)?
Though "atoms" means indivisible, we now know that atoms are made of these 3 smaller, subatomic particles
What are protons, neutrons, and electrons?
a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation.
What is a hypothesis?
The default charge of any element on the periodic table
What is neutral charge?
The Greek word "atomos" means this
What is indivisible?
Dalton's atomic theory was developed around how atoms of different elements combined to form _____.
What are compounds?
This scientist used the analogy of a planetary system to describe atoms
Who is Bohr?
an explanation of an aspect of the natural world that can be repeatedly tested and verified in accordance with the scientific method
What is a theory?
Describes the amount of protons and neutrons in an atom
This man believed that all matter was made up of four elements.
Who is Aristotle?
Thomson was the first person to discover that atoms had _______.
What are electrons?
This model is the most recent and current explanation of the atomic theory
What is the electron cloud model?
statements, based on repeated experiments or observations, that describe or predict a range of natural phenomena
What is a law?
Variants of a particular chemical element which differ in neutron number
What are isotopes?
The majority of mass is found in this part of the atom
What is the nucleus?
Thomson used this analogy to describe the atom
What is plum pudding (or chocolate chip cookie)?
This scientist used the gold foil experiment to provide evidence that most of the atom is empty space
Who is Rutherford?
Procedures consisting in systematic observation, measurement, and experiment, and the formulation, testing, and modification of hypotheses.
What is the scientific method?
a Lithium atom with a +2 charge is also called a _____
What is a cation?
The unit that is used to describe the mass of an atom (The complete name)
What is atomic mass unit (amu)?
Rutherford used these fast moving positively charged particles in his gold foil experiment, to discover that the nucleus had a positive charge
What are alpha particles?
This explanation states that the momentum of an electron and position cannot both be known at the same time
What is the uncertainty principle? (Heisenberg)
a collection of beliefs or practices mistakenly regarded as being based on scientific method.
What is pseudoscience?
One of the 4 fundamental forces that holds the nucleus of an atom together
What is Strong nuclear force?