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Philosophers
Periodic Table
Atoms
Bohr Model
Diagrams
100
Who one of the first people to have thought matter is formed of small pieces?
Democritus
100
A row in the Periodic Table is known as what?
A period
100
What is the smallest piece of matter: which is made up of protons, neutrons and electrons.
Atoms
100
The atomic number is the same as the number of what?
protons or electrons
100
Create a Bohr model of Hydrogen. protons(atomic number)=1 neutrons=0 electrons(atomic number)=1
One shell 1 VE
200
Democritus called the smallest piece of matter atomos, which is greek for...
uncuttable
200
A column in the Periodic Table is known as what?
group or family
200
A particle located in the nucleus that has no charge.
neutron
200
What simple math problem is used to figure out the number of neutrons?
Atomic mass-number of protons=number of neutrons
200
Create a Bohr model of Helium protons(atomic number)=2 nuetrons=2 electrons(atomic number)=2
one shell VE=2
300
Who is the british school teacher that came up with 6 conclusions on atoms?
John Dalton
300
Elements that are in the same group or family have similar what?
Properties
300
A particle inside the nucleus that has a positive charge.
proton
300
How many electrons can fit in the first electron shell(energy level)?
2
300
Create a Bohr model of Beryillium protons(atomic number)=4 nuetrons=5 electrons(atomic number)=4
two shells VE=2
400
One of John Dalton's conclusions was atoms of each element have a unique....?
mass
400
The elements in the 18th group(the last group) of the Periodic Table are known as what?
Noble Gases
400
A particle ouside of the nucleus, located in the shells.
electrons
400
How many electrons can fit in the second electron shell(energy level)?
8
400
Create a Bohr model of Boron protons(atomic number)=5 nueutrons=6 electrons(atomic number)=5
two shells VE=3
500
Another of Dalton's conclusions is atoms of two or more elements can combine to form...?
compounds
500
Why were the elements in the botton of the Periodic Table removed from the table? (lanthanides and actinides)
to make the table easier to read and have better layout.
500
The atomic mass of an atom is when you add what two particles?
protons and neutrons
500
The electrons that are located in the outer most electrons shell(energy level) are known as what?
valence electrons
500
Create a Bohr model of Calcium protons(atomic number)=20 nuetrons=20 electrons(atomic number)=20
three shells VE=10