Common Monoatomic and Polyatomic Ions Quiz

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Questions and Answers

What is the charge of a Nitride ion?

  • -3 (correct)
  • -2
  • +1
  • -1

The ion for aluminum is Al3-.

False (B)

What is the formula for the sulfate ion?

SO4^2-

The ion NO3- is called __________.

<p>nitrate</p> Signup and view all the answers

Match the following polyatomic ions with their formulas:

<p>Ammonium = NH4+ Phosphate = PO4^3- Hydroxide = OH- Acetate = C2H3O2-</p> Signup and view all the answers

Flashcards

Lithium ion charge

Lithium (Li) ion has a +1 charge.

Nitrate formula

Nitrate ion is represented by the formula NO3⁻

Sulfate formula

Sulfate is SO₄²⁻

Ammonium ion formula

Ammonium ion is NH₄⁺

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Phosphate ion charge

Phosphate ion has a -3 charge.

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Study Notes

Common Monoatomic Ions

  • Group 1A (Alkali Metals): These ions have a +1 charge. Examples include lithium (Li+), sodium (Na+), potassium (K+), rubidium (Rb+), and cesium (Cs+).

  • Group 2A (Alkaline Earth Metals): These ions have a +2 charge. Examples include beryllium (Be²⁺), magnesium (Mg²⁺), calcium (Ca²⁺), strontium (Sr²⁺), and barium (Ba²⁺).

  • Group 3A: These ions have a +3 charge. Boron (B³⁺) and aluminum (Al³⁺) are examples.

  • Group 5A: These ions have a -3 charge. Examples include nitrogen (N³⁻) and phosphorus (P³⁻).

  • Group 6A: These ions have a -2 charge. Examples include oxygen (O²⁻) and sulfur (S²⁻).

  • Group 7A (Halogens): These ions have a -1 charge. Examples include fluorine (F⁻), chlorine (Cl⁻), bromine (Br⁻), and iodine (I⁻).

Common Polyatomic Ions

  • Nitrite: NO₂⁻

  • Nitrate: NO₃⁻

  • Sulfite: SO₃²⁻

  • Sulfate: SO₄²⁻

  • Ammonium: NH₄⁺

  • Phosphate: PO₄³⁻

  • Phosphite: PO₃³⁻

  • Hydroxide: OH⁻

  • Hypochlorite: ClO⁻

  • Chlorite: ClO₂⁻

  • Chlorate: ClO₃⁻

  • Perchlorate: ClO₄⁻

  • Chromate: CrO₄²⁻

  • Dichromate: Cr₂O₇²⁻

  • Permanganate: MnO₄⁻

  • Acetate: C₂H₃O₂⁻

  • Carbonate: CO₃²⁻

  • Bicarbonate (Hydrogen Carbonate): HCO₃⁻

  • Cyanide: CN⁻

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