Introduction to Atoms
Organizing the Elements
Metals
Nonmetals and Metalloids
Chapter 4 Vocabulary
100
The idea of the atom took place during these two time periods.
What are 430B.C. and the 1600s?
100
By the year 1869 this many elements had been discovered.
What is 63?
100
Shininess, malleability, ductility, and conductivity.
What are the 4 physical properties of metal?
100
The air you breathe is mostly a mixture of these two nonmetals.
What are nitrogen (N) and oxygen (O)?
100
The unique number of protons in the nucleus of an atom.
What is atomic number?
200
Model stating that an atom was mostly empty space.
What is The Rutherford Model?
200
The British scientist who discovered a way to measure the positive charge on an atom's nucleus.
Who is Henry Moseley?
200
Most metals are solids at this temperature.
What is room temperature?
200
The most reactive element known...its symbol is (F)
What is fluorine?
200
Atoms with the same number of protons and different number of neutrons.
What are isotopes?
300
These were the first people to think about the nature of matter.
Who were the Ancient Greeks?
300
On the periodic table of elements AU is the symbol for this.
What is gold?
300
Alkali metals react with other elements by losing this.
What is one electron?
300
Fluorine, chlorine, bromine, iodine, and astatine...these elements are known as this.
What are halogens?
300
Table of elements, arranged by atomic number, that shows the patterns in their properties, based on the periodic law.
What is the periodic table of elements?
400
It takes this many electrons to equal the mass of just one proton.
What is 2000?
400
Metal, metalloid, nonmetal, and properties not established.
What are the 4 groups of elements found on the periodic table?
400
Transition metals are god conductors of this.
What is electricity?
400
The element with simplest and smallest atoms.
What is hydrogen (H)?
400
The process in which two atomic nuclei combine, forming a large nucleus, and releasing huge amounts of energy.
What is nuclear fusion?
500
The Greek philosopher who proposed the idea that matter is formed of small pieces that could not be cut into smaller parts.
Who is Democritus?
500
The properties of an element can be predicted from this.
What is its location in the periodic table?
500
The difficulty of synthesizing new elements increases with this.
What is atomic number?
500
Whether or not a metalloid conducts electricity can depend on these three things.
What are temperature, exposure to light, and the presence of small amounts of impurities?
500
Substances that can conduct electricity under some conditions, but not under other conditions.
What are semiconductors?
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