Welcome to the Quiz!
This quiz contains 7 questions from a mix of 1 subtopics.
Why do atomic radii decrease across a period?
(Select all that apply).
there are no additional electron shells to provide more shielding
the number of electrons in the outer energy level increases
the number of sub-atomic particles in the nucleus increases
the charge on the nucleus increases
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What is the term for the reduction in attraction between outer electrons and the nucleus due to the presence of inner shells of electrons?
shielding
repelling
repulsion
attraction
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Atomic radius across a period and down a group.
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Select the element with the highest melting point
P4
Cl2
Ar
S8
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Name the element in period 3 with the highest melting point.
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There is a sharp decrease in melting points across period 3 from group to group .
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How does melting point change going across period 3 from Na to Si?
it decreases
it increases
it remains roughly the same
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