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Ansley - Atoms

Atoms; Atomic Theory

Who was Democritus? a Greek philosopher who was the first to propose the idea of the atom - he called it atomos (meaning "can't be divided")
Rutherford's gold foil experiment identified _____________ in the positively charged center of the atom. proton
His modern atomic theory was the first time in 2000 years that science looked at the idea of the atom. Who is this scientist? Dalton
His "plum pudding" (chocolate chip) model helped explain the newly discovered electron. JJ Thomson
The Russian scientist who first arranged the periodic table Dmitri Mendeleev
What is an atom? the smallest unit of an element that maintains the properties of that element
Where is the positively charged proton found in the atom? in the nucleus
Where is the positively charged electron found in the atom? in the electron cloud surrounding the nucleus
Where is the positively charged neutron found in the atom? in the nucleus
List the three subatomic particles and their charges? 1. proton - positive (+) 2. neutron - no charge (0) 3. electron - negative (-)
What are the columns in the periodic table called? families/groups
What are the rows in the periodic table called? periods
The elements on the left side of the stair step line of the periodic table of elements are called _______________. metals.
The group of elements that touch the stair step line on the periodic table of elements are called ________________. metalloids.
The atomic number is the same as the number of ________________. protons
To find the _________________ of the element, you add the protons and the neutrons. atomic mass
Materials made up of the same type of atom are called__________________. elements
The ______________ is the number of protons in the nucleus of an atom. atomic number
Which element has 6 protons? carbon?? (is there a picture for this one)?
How would the following be categorized: The object is shiny, ductile, and conducts electricity. metal
Using a periodic table, which of the following are non metals: K, Si, O, Mg, Ne? O (oxygen), Ne (neon)
Can a carbon atom have more than 6 atoms? Why or why not? No - because if it had protons taken away or added, it would be a completely different element
Created by: ortht