Inorganic Compounds Nomenclature Quiz

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Questions and Answers

What is the term for a negatively charged ion?

  • Oxide ion
  • Phosphide ion
  • Cation
  • Anion (correct)

Which element forms the anion with the name 'nitride ion'?

  • Nitrogen (correct)
  • Chlorine
  • Bromine
  • Fluorine

What is the charge on the strontium ion?

  • +1
  • +2 (correct)
  • +3
  • -2

Which statement about ions is true?

<p>The charge on an ion can be predicted from its position in the periodic table. (D)</p> Signup and view all the answers

What is the correct formula for the compound formed by sodium and bromine ions?

<p>NaBr (A)</p> Signup and view all the answers

What is the purpose of chemical nomenclature?

<p>To precisely identify the chemical composition of compounds (C)</p> Signup and view all the answers

Why do chemists prefer systematic names over common names?

<p>Systematic names precisely identify the chemical composition of compounds (B)</p> Signup and view all the answers

What organization devised the present system of inorganic chemical nomenclature?

<p>The International Union of Pure and Applied Chemistry (IUPAC) (B)</p> Signup and view all the answers

What is the formula for most elements?

<p>The symbol of the element (D)</p> Signup and view all the answers

Which elements are found in nature as diatomic molecules?

<p>Hydrogen, Nitrogen, Oxygen, Fluorine, Chlorine, Bromine, Iodine (B)</p> Signup and view all the answers

Why do chemists prefer systematic names over common names?

<p>Common names do not precisely identify the chemical composition of the compound. (D)</p> Signup and view all the answers

What class of names are common names?

<p>Based on outstanding chemical or physical properties. (B)</p> Signup and view all the answers

Which organization devised the present system of inorganic chemical nomenclature?

<p>The International Union of Pure and Applied Chemistry (IUPAC) (B)</p> Signup and view all the answers

What is the purpose of chemical nomenclature?

<p>To develop a system of names that precisely identify the chemical composition of compounds. (D)</p> Signup and view all the answers

What is the formula for most elements?

<p>$E$ (A)</p> Signup and view all the answers

What is the name of the anion formed from sulfur?

<p>Sulfide ion (A)</p> Signup and view all the answers

Which element forms the cation with a +2 charge?

<p>Strontium (C)</p> Signup and view all the answers

What is the name of the anion formed from barium?

<p>Bariumide ion (D)</p> Signup and view all the answers

Which group of elements is likely to form ions with a -3 charge?

<p>Group VA (A)</p> Signup and view all the answers

What is the correct formula for the compound formed by magnesium and oxygen ions?

<p>MgO (B)</p> Signup and view all the answers

Flashcards

Anion

A negatively charged ion formed by gaining electrons.

Nitride ion

The anion formed from nitrogen with a -3 charge.

Charge on strontium ion

The charge on the strontium ion is +2.

Ions

Ions are atoms with a positive or negative charge due to the gain or loss of electrons.

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Sodium bromide formula

The chemical formula for the compound sodium bromide, which consists of sodium ions (Na+) and bromide ions (Br-), is NaBr.

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Chemical nomenclature

Chemical nomenclature is the naming system used for chemical compounds. It provides standard names for identifying specific chemical compounds.

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Systematic names

Chemists prefer systematic names because these names accurately reflect the chemical composition of a compound, eliminating ambiguity.

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IUPAC

The International Union of Pure and Applied Chemistry (IUPAC) developed the present system of inorganic chemical nomenclature, ensuring uniformity in chemical naming.

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Formula for most elements

Most elements are represented by their single-letter or two-letter symbols.

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Diatomic molecules

Hydrogen, Nitrogen, Oxygen, Fluorine, Chlorine, Bromine, and Iodine exist naturally as diatomic molecules, meaning they consist of two atoms bonded together.

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Common names

Common names are based on physical or chemical properties of a compound, not necessarily reflecting their exact chemical composition.

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Sulfide ion

The anion formed from sulfur is the sulfide ion (S-2).

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Strontium cation

Strontium forms a cation with a +2 charge, meaning it loses two electrons to become a positively charged ion.

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Bariumide ion

Barium forms an anion with a -2 charge, called the bariumide ion.

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Ions with -3 charge

Group VA elements, also known as pnictogens, are likely to form ions with a -3 charge due to their electron configuration.

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Formula of magnesium oxide

The correct formula for the compound formed by magnesium and oxygen is MgO. Magnesium forms a +2 ion (Mg2+) and oxygen forms a -2 ion (O2-), resulting in a 1:1 ratio.

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Study Notes

  • Chemical nomenclature is the system used by chemists to identify compounds, with two classes of names: common and systematic.
  • Common names are arbitrary and based on outstanding properties, while systematic names precisely identify chemical composition.
  • Systematic names were devised by the International Union of Pure and Applied Chemistry (IUPAC).
  • Elements: most have formula equal to symbol, some are diatomic (H2, N2, O2, F2, Cl2, Br2, I2).
  • Two elements, sulfur and phosphorus, are commonly polyatomic.
  • Ions are formed by adding or removing electrons from atoms, forming cations (positive ions) or anions (negative ions).
  • Cations are named after their parent atoms (Na+ is sodium ion, Ca2+ is calcium ion).
  • Anions are named by adding –ide to the stem of the parent element (F- is fluoride ion, Cl- is chloride ion).
  • Ions formed by adding electrons are called anions, those formed by removing electrons are called cations.
  • A chemical compound must have a net charge of zero if it contains ions.
  • Write the formula for calcium chloride: CaCl2 (smallest numbers of Ca2+ and Cl- combine to make zero charge).
  • Write the formula for barium phosphide: BaP (smallest numbers of Ba2+ and P combine to make zero charge).
  • Systematic names precisely identify the chemical composition of a compound.
  • International Union of Pure and Applied Chemistry (IUPAC) devised the present system of inorganic chemical nomenclature.
  • Elements have symbols, some are diatomic (H2, N2, O2, F2, Cl2, Br2, I2).
  • Sulfur and phosphorus are common polyatomic elements.
  • Ions formed by adding electrons are called anions, those formed by removing electrons are called cations.
  • Cations are named after their parent atoms, anions are named by adding –ide to the stem of the parent element.
  • Write the formula for a compound by making sure the total charge is zero.
  • Calcium chloride formula: CaCl2.
  • Barium phosphide formula: BaP.

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