Question

write formulas of the given monatomic ions. you must include the positive or negative signs. be careful with superscripts and subscripts.
monatomic ions
lithium ion __________ cadmium ion __________
nitride __________ calcium ion __________
strontium ion __________ bromide __________
iodide __________ barium ion __________
zinc ion __________ selenide __________
silver ion __________ aluminum ion __________
write the formula if given the name. or write the name if given the formula. you must include the positive or negative signs when needed. be careful with superscripts and subscripts and remember nice children say please!!
polyatomic ions
phosphate __________ so₄²⁻ __________
nitrate __________ co₃²⁻ __________
ammonium __________ ch₃coo⁻ __________
hydroxide __________ no₃⁻ __________

Explanation:

Step1: Determine lithium ion

Lithium (Li) has a +1 charge when it forms an ion. So the formula is $Li^{+}$.

Step2: Determine nitride ion

Nitrogen (N) gains 3 electrons to form an ion, so the formula is $N^{3 - }$.

Step3: Determine strontium ion

Strontium (Sr) has a +2 charge when it forms an ion. So the formula is $Sr^{2+}$.

Step4: Determine iodide ion

Iodine (I) gains 1 electron to form an ion, so the formula is $I^{-}$.

Step5: Determine zinc ion

Zinc (Zn) has a +2 charge when it forms an ion. So the formula is $Zn^{2+}$.

Step6: Determine silver ion

Silver (Ag) has a +1 charge when it forms an ion. So the formula is $Ag^{+}$.

Step7: Determine cadmium ion

Cadmium (Cd) has a +2 charge when it forms an ion. So the formula is $Cd^{2+}$.

Step8: Determine calcium ion

Calcium (Ca) has a +2 charge when it forms an ion. So the formula is $Ca^{2+}$.

Step9: Determine bromide ion

Bromine (Br) gains 1 electron to form an ion, so the formula is $Br^{-}$.

Step10: Determine barium ion

Barium (Ba) has a +2 charge when it forms an ion. So the formula is $Ba^{2+}$.

Step11: Determine selenide ion

Selenium (Se) gains 2 electrons to form an ion, so the formula is $Se^{2 - }$.

Step12: Determine aluminum ion

Aluminum (Al) has a +3 charge when it forms an ion. So the formula is $Al^{3+}$.

Step13: Determine phosphate ion

The formula for phosphate ion is $PO_{4}^{3 - }$.

Step14: Determine sulfate ion name

The name of $SO_{4}^{2 - }$ is sulfate ion.

Step15: Determine nitrate ion

The formula for nitrate ion is $NO_{3}^{-}$.

Step16: Determine carbonate ion name

The name of $CO_{3}^{2 - }$ is carbonate ion.

Step17: Determine ammonium ion

The formula for ammonium ion is $NH_{4}^{+}$.

Step18: Determine acetate ion name

The name of $CH_{3}COO^{-}$ is acetate ion.

Step19: Determine hydroxide ion

The formula for hydroxide ion is $OH^{-}$.

Step20: Determine nitrite ion name

The name of $NO_{2}^{-}$ is nitrite ion.

Answer:

lithium ion: $Li^{+}$
nitride: $N^{3 - }$
strontium ion: $Sr^{2+}$
iodide: $I^{-}$
zinc ion: $Zn^{2+}$
silver ion: $Ag^{+}$
cadmium ion: $Cd^{2+}$
calcium ion: $Ca^{2+}$
bromide: $Br^{-}$
barium ion: $Ba^{2+}$
selenide: $Se^{2 - }$
aluminum ion: $Al^{3+}$
Phosphate: $PO_{4}^{3 - }$
$SO_{4}^{2 - }$: sulfate ion
Nitrate: $NO_{3}^{-}$
$CO_{3}^{2 - }$: carbonate ion
Ammonium: $NH_{4}^{+}$
$CH_{3}COO^{-}$: acetate ion
Hydroxide: $OH^{-}$
$NO_{2}^{-}$: nitrite ion