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What does the atomic number tell you?
The number of protons (and electrons if the element is neutral)
Where are Valence Electrons found?
The outermost shell
What are 3 properties you could use to describe metals?
Luster (shiny or metallic), conductors, solids, malleable, ductile
Why are groups 1 and 7 the most reactive?
They are one valence electron away from stability
What 2 groups are the most reactive?
Groups 1 and 17 (7A)
What period is this element in?
Period 4
What must be true of the element represented by the "X"?
 
It will have chemical properties similar to C.
 
It will have 28 protons
 
It will have 6 total electrons.
 
It will have a mass greater than 30.
A student hypothesizes that sodium (Na) has different chemical properties than magnesium (Mg). Why would they think that?
Sodium and magnesium have different numbers of valence electrons.  They are in different groups
Valence Electrons determie the __________________ .
Chemical Properties or Reactivity of the atom.
What color is the blue section of the periodic table.
The Metals
Which of the following lists of properties best describes nonmetals?
 
Brittle, dull, insulator
 
brittle, shiny, conductor
 
malleable, shiny conductor
 
Malleable, dull, insulator
When metals, nonmetals, and metalloids are compared according to luster, which is the best description of the appearance of metalloids?
 
Either Shiny or Dull
 
Dull
 
Shiny
 
Powdery
What common property do sulfur and oxygen have in common?
 
Both have 6 valence electrons
 
Both are metals
 
Both are gases
 
Sulfur and oxygen do not have a common property
Based on the Periodic Table, which of the following elements has physical and chemical properties most like potassium?
 
Sodium
 
Neon
 
Bromine
 
Calcium
Which of the following is true for elements listed in the same column of the periodic table?
 
they have similar chemical properties
 
mass of their atoms are similar
 
atoms are the same size
 
have the same number of protons
What characteristic of an element is the best indicator for determining what other elements it will react with?
 
the number of valence Electrons
 
The number of neutrons of the element
 
The atomic mass of the element
 
The number of protons in the element
What is the family group # and period for this element?
group 5. period 2
A researcher wants to experiment with an element that reacts like sulfur (S) but has a greater atomic mass. Which elements should the researcher select for the experiment?
Selenium, Tellurium, Polonium
Based on the periodic table what do you know about these elements?
They all have the number of energy levels/shells.
Why do noble gases have inactivity (stability)?
these atoms have full outershells.


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