12. Which two elements have the most similar chemical properties?
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1 point
Na and P
Ca and Br
Cl and Ar
Be and Mg
Be and Mg
11. Using the periodic table of elements, Which statement best describes the elements located in group 17?
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1 point
The elements in group 17 are both noble gases and metals.
The elements in group 17 are both noble gases and nonmetals.
The elements in group 17 are both halogens and nonmetals.
The elements in group 17 are both halogens and metals.
The elements in group 17 are both halogens and nonmetals.
10. Nitrogen (N) behaves most like what other element?
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1 point
lithium (Li)
calcium (Ca)
phosphorus (P)
neon (Ne)
Phosphorus (P)
9. Using a periodic table, Why do noble gases typically not react with other elements chemically?
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1 point
because they have more protons than other elements
because they have a full outer shell of valence electrons
because they have a single valence electron in their outer shell
because they have fewer neutrons than other elements