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Atomic Theories
Organization
Families
What's in each square?
Vocabulary
100
This English chemist created a theory that is still accepted today with few changes.
Who is John Dalton?
100
This Russian scientist discovered a set of patterns that applies to all of the elements.
Who is Mendeleev?
100
The metals in group one are called this.
What are the alkali metals?
100
This number is found at the top of each square.
What is the atomic number?
100
consists of two atoms
What is a diatomic molecule?
200
This scientist thought that negative particles were scattered throughout a ball of positive charge.
Who is JJ Thomson?
200
Vertical columns on the periodic table
What are groups or families?
200
The elements in this family are not reactive.
What are the noble gases?
200
This is the name for the letter or letters found in each square.
What is the chemical symbol?
200
atoms with the same number or protons and a different number of neutrons
What are isotopes?
300
This scientist experimented with gold foil and discovered that the positive charges are contained in a nucleus and the negative charges are in orbits.
Who is Rutherford?
300
Horizontal rows on the periodic table
What are periods?
300
These are found in families 3 - 12.
What are the transition metals?
300
This is the number found at the bottom of each square.
What is the atomic mass?
300
the smallest particle of an element
What is an atom?
400
This Danish scientist said that electrons could only have certain amounts of energy and therefore could only be in certain orbits.
Who is Neils Bohr?
400
This is the most reactive side of the periodic table.
What is the left side?
400
The elements in this family can gain, lose, or share four electrons when they combine.
What is the carbon family?
400
The number of protons is equal to this number.
What is the number of electrons?
400
negatively charged particles
What are electrons?
500
This theory places both positive and neutral charges in a nucleus with the negative charges in a cloud surrounding the nucleus.
What is the modern atomic theory?
500
The atomic numbers change in this way from left to right on the periodic table.
What is increase?
500
This family contains the "salt forming" elements.
What is the halogen family?
500
Sometimes you will see numbers on the side of the square. These numbers stand for this part of an atom.
What are the electrons?
500
a material that can be made into a thin wire
What is ductile?