Question

question 1 (1 point)
why does tyler dewitt say it is important to memorize the polyatomic ions?
a so that you can recognize and predict the behavior of these ions in various contexts
b so that you are not confused by which ions are found on the periodic table and which ones are polyatomic
c because it serves as a building block for more complex compounds to come

question 2 (1 point)
what is the formula for aluminum nitrate?
a ano₃
b al(no₃)₃
c al₂no₃

question 3 (1 point)
what is the formula of a made - up compound called wixium phosphate? wixiums symbol is wx and is found in group 1a.
a wx₃(po₄)₄
b wx₃po₄
c wx(po₄)₂
d wxpo₄

Explanation:

Question 1:

Memorizing polyatomic ions helps in recognizing and predicting their behavior in different chemical contexts. It also serves as a basis for understanding more complex compounds. Option a and c are valid reasons. Option b is less relevant as understanding polyatomic ions is not mainly about differentiating from periodic - table ions.

Question 2:

Aluminum has a +3 charge ($Al^{3 + }$) and nitrate is $NO_{3}^{-}$. To balance the charges, we need 3 nitrate ions for 1 aluminum ion, so the formula is $Al(NO_{3})_{3}$.

Question 3:

Wixium is in group 1A, so it has a +1 charge ($Wx^{+}$). Phosphate is $PO_{4}^{3 - }$. To balance the charges, we need 3 wixium ions for 1 phosphate ion, so the formula is $Wx_{3}PO_{4}$.

Answer:

Question 1: a, c
Question 2: b
Question 3: b