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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 Carbon.
 
It will have 6 total electrons.
 
It will have 28 protons.
 
It will have a mass greater than 30.
A student states that sodium (Na) has different chemical properties than magnesium (Mg).  Do you agree? Justify your answer.
Sodium and magnesium have different numbers of valence electrons.
Valence Electrons determine the __________________ .
Chemical Properties or Reactivity of the atom.
Is the blue section of the periodic table showing metals, nonmetals or metalloids?
Metals
Which of the following lists of properties best describes nonmetals?
 
Brittle, dull, insulator
 
Malleable, shiny, conductor
 
Brittle, 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 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 any properties in common
Based on the Periodic Table, which of the following elements has physical and chemical properties most like potassium?
 
Sodium
 
Calcium
 
Bromine
 
Neon
Which of the following is true for elements listed in the same column of the periodic table?
 
they have similar chemical properties
 
they have the same number of protons
 
they are identical
 
they have the same atomic mass
Why is this family, the Halogens, the most reactive NONMETAL family?
They are 1 electron away from having a full outer shell.
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
What is the 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
Why is the group alkali metals the most reactive metals?
Alkali metals only have one valence electron.
Why are noble gases nonreactive/ stable/ or least reactive?
these atoms have full outershells.


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