Science Unit B Test
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33 Terms
What does the atomic number of an element represent
Number of Protons
What does the mass number represent of an element
Average Mass
What are the three subatomic particles of an element
Protons Neutrons electrons
Period
The rows
Atomic Mass
average mass of the element
What are Valence electrons
Electrons in the outermost energy level of an atom
Group 4, Period 5
Zicronium
Group 2, Period 2
Beryllium
Group 6, Period 6
Tungsten
Group 18, Period 1
Helium
Group 14, Period 5
Tin
Group 12, Period 4
Zinc
Group 1, Period 7
Francium
Poor conductor of electricity
Nonmetal
Usually a solid at room temp
Metal
Ductile
Metal
Chlorine
nonmetal
Semiconductor
Metalloid
Silicon
Metalloid
Malleable
Metal
Usually a gas at room temp
Nonmetal
Cobalt
metal
Good conductor
Metal
Brittle
Nonmetal/metalloid
oxygen
nonmetal
The elements in groups 3 through 12 are called…
transition metals
The elements in group 1 are called…
Alkali metals
The elements in group 2 are called…
Alkaline earth metals
The elements in group 18 are called…
Noble gases
The elements in group 17 are called…
Halogens
The elements in group_are the most reactive metals
group 1
The elements in group_are the most reactive nonmetals
group 17
The elements in group_are very unreactive
group 18