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Metals
Non metals
Metalloids
Noble gases
History
100
________ are elements that are good conductors of heat and electricity.
Metals
100
Hydrogen can be grouped with what types of elements
Non metals
100
Silicon belongs to this group of elements.
Metalloids
100
Noble gasses have a _________ outer energy level.
Full, complete, stable
100
Who developed the first periodic table?
Mendeleev
200
Which group of METALS is the most reactive?
Alkaline metals
200
How does the melting point of metals compare with that of nonmetals?
Metals have a higher melting point
200
Can metalloids conduct electricity
Yes
200
What common property is shared by all the noble gases?
Do not easily form chemical compound
200
Mendeleev’s periodic table was organized by increasing _________ __________.
Atomic mass
300
Alkaline earth metals have __________ valence electron(s).
Two, 2
300
When aluminum reacts with dilute hydro-chloric acid, what does it form?
It forms aluminum chloride and gives out hydrogen
300
4. Examples of metalloids?
Boron, silicon
300
Why are noble gases the least reactivate?
Noble gases have completely filled orbitals.
300
The _________________ was discovered by Newlands.
Law of octaves
400
Ductile means metals can_______________.
Can be made into a wire
400
What properties distinguish metals from non-metals?
Whether they are lustrous or shiny, ductile or not, good conductors of energy or not, or opaque or transparent
400
What are two uses of metalloids?
Boron is used in making filaments used in aerospace industry whereas the metalloid, silicon is used in nearly all kinds of electronics.
400
Why are noble gases the most stable?
Having the maximum valence electrons
400
Ionization energies tend to _________ from left to right across the periodic table.
Increase
500
List three characteristics of metals.
Luster, ductile and malleable, high density, high melting points, good conductors!
500
What are some properties of non-metals?
They are brittle, dull, poor conductors, and have low densities.
500
Where are metalloids found on the periodic table
Between metals and non-metals, in a zig-zag line.
500
Why noble gases are called inert gases?
Because they don’t react.
500
Which group contains the noble gases?
Group 18 or Group 8A