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Scientists
What is Chemistry?
Atomic Structure
Stochiometry
Miscelleaneous
100
Discovered that each element is composed of tiny, indestructable particles called atoms
Who is John Dalton?
100
The most common phase of matter. ex: ionized gas
What is plasma
100
when the number of protons is equal to the number of neutrons
What is a neutral atom?
100
the relationship between elements in a compound and between elements and compunds in a reaction
What is Stochiometry?
100
this loses an electron and has a positive charge; Formed from metals
What is a cation?
200
Discovered the Mass to Charge ratio of an electron
Who is Thomson?
200
This state of matter has no definite volume or shape
What is gas?
200
Si with an atomic number of 28, has __ protons, __ neutrons, and __ electrons
What is 14, 14, and 14?
200
Combination of elements
What is a chemical compound?
200
a compound that has a negative charge, gains electrons, and include the element oxygen
What is an oxyanion?
300
Preformed an oil drop experiment in which he deduced the charge of a single electron
Who is Milikan?
300
The molecular structure of this state of matter contains atoms that stay in contact yet are disorganzied
what is liquid?
300
when the elements are the same, but the mass and number of neutrons are different
What is an isotope?
300
the lowest substance which describes the ratio
What is a formula unit?
300
CN-1
What is the cyanide ion?
400
Discovered that the atom must have a small, dense nucleus that contains positively sharges particles.
Who is Rutherford?
400
When a substance alters its form, not composition
What is a physical change?
400
6.022 * 10 to the 23
What is Avagadro's number?
400
molecule mulitple of the formula unit that exists
What is an empirical formula?
400
ClO-
What is hypochlorite?
500
Greek philosopher that theorized that matter was ulitimately composed of small, indivisible particels called atoms
Who is Democritus?
500
When a substance changes into another sunstance
what is a chemical change?
500
Determines the isotope mass and abundance
What is the mass spectrometer?
500
grams of element/ grams of compound * 100
What is the percent composition formula?
500
PCl5
What is phosphorous pentachloride?