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Elements PT SG

QuestionAnswer
Substances that are made from one type of atom only are called? Pure substances
Substances that are made from more than one type of atom bonded together are called? Compounds
Compounds that are combined physically but not chemically are called? Mixtures
Who created the first accepted version of the periodic table? Dmitri Ivanovich Mendeleev
How were elements grouped on Mendeleev's PT? According to atomic mass
Elements are now organized by what? Atomic number
Atomic number refers to what? The number of protons an atom has
Atomic mass refers to what? The atom's "weight"
Equation for atomic mass? Protons plus neutrons
AMU stands for what? Atomic Mass Unit
One AMU equals what? One proton
What are good conductors, as well as being ductile and malleable? Metals
What is a physical property of metals? Reaction with water to corrode
What are poor conductors, not ductile or malleable? Non-metals
What have properties of both metals and non-metals? Metalloids
Columns of elements are called what? Families/groups
Elements in the same group have the same what? Number of valence electrons
Rows of elements are called what? Periods
Elements in periods are what in properties? Not alike
The first element in each period is what? An extremely active solid
The last element in each period is what? An inactive gas
Hydrogen is a what at room temperature? Gas
Group One is called what? Alkali Metals
Group Two is called what? Alkaline Metals
Group Three is called what? Boron Family
Group Four is called what? Carbon Family
Group Five is called what? Nitrogen Family
Group Six is called what? Oxygen Family
Group Seven is called what? Halogens
Group Eight is called what? Noble Gases
Rare earth metals are what and do what? Radioactive and conduct electricity
Created by: reneslacis
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