Chapter 2: Atoms, Molecules, and Ions

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Predict the chemical formula for the ionic compound formed by NH₄⁺ and PO₄³⁻

(NH₄)3(PO₄)

*Provide the correct IUPAC name for Co₂(SO₄)₃.

(remember cobalt is a metal -> ionic compound) cobalt(III) sulfate

How many protons (p) and electrons (e) are found in a Se²⁻ ion? A) 34 p, 36 e B) 34 p, 32 e C) 32 p, 34 e D) 36 p, 34 e E) 34 p, 34 e

A) 34 p, 36 e

Which has the correct name-formula combination? A) Potassium nitrate - KNO₂ B) Cesium sulfate - Cs₂SO₃ C) Calcium sulfite - CaSO₃ D) Strontium nitrite - Sr(NO₃)₂

C) Calcium sulfite - CaSO₃

Determine the correct formula for iron(III) perchlorate. A) Fe₂ClO₄ B) Fe₂(ClO₄)₃ C) Fe(ClO₄)₃ D) Fe₃(ClO₄)₂

C) Fe(ClO₄)₃

Write the chemical formula for carbon disulfide

CS₂

Predict the chemical formula for the ionic compound formed by Ca²⁺ and ClO₃⁻

Ca(ClO₃)2

Provide the correct IUPAC name for CBr₄.

Carbon tetrabromide

Write the chemical formula for cobalt(II) oxide

CoO

Provide the correct IUPAC name for CoPO₄.

Cobalt (III) phosphate

Write the chemical formula for cesium carbonate

Cs₂CO₃

Determine the correct formula for titanium(IV) chloride. A) TiCl₂ B) Ti₄Cl C) Ti₂Cl₄ D) TiCl₄

D) TiCl₄

Which of the following represents a species with 39 protons and 36 electrons? A) K⁺ B) Y C) Ca²⁺ D) Y³⁺ E) Ar

D) Y³⁺

Which of the following atoms has the same number of neutrons as ⁵⁹Ni? A) ⁵⁷Co B) ⁵⁸Fe C) ⁵⁸Ni D) ⁵⁹Co E) ⁶⁰Cu

E) ⁶⁰Cu

Write the chemical formula for iron(III) chloride hexahydrate

FeCl₃•6H₂O

**Write the chemical formula for mercury(I) nitrate dihydrate

Hg₂(NO₃)₂•2H₂O

*Provide the correct IUPAC name for FeCl₃ · 6H₂O.

Iron (I) Chloride Hexahydrate (not -hydride)

Write the chemical formula for sodium hydride

NaH

Write the chemical formula for tetraphosphorus hexasulfide

P₄S₆

*Provide the correct IUPAC name for P₄S₃.

Tetraphosphorus trisulfide (not trisulfate)

*Write the chemical formula for zinc nitrate

Zn(NO₃)₂

Provide the correct IUPAC name for CuNO₃.

copper(I) nitrate

Provide the correct IUPAC name for N₂O₄.

dinitrogen tetraoxide

*Write the chemical formula for dinitrogen tetroxide N₂O₄

dinitrogen tetroxide (not tetraoxide)

**Provide the correct IUPAC name for HCN(aq).

hydrocyanic acid

Provide the correct IUPAC name for IF₅.

iodine pentafluoride

Provide the correct IUPAC name for MnSO₄.

manganese(II) sulfate

**Provide the correct IUPAC name for HClO₄(aq).

perchloric acid

**Provide the correct IUPAC name for H₂SO₃(aq).

sulfurous acid

An atom of the isotope ¹³³Cs contains how many protons (p), neutrons (n), and electrons (e)? A) 55 p, 55 n, 55 e B) 55 p, 78 n, 55 e C) 133 p, 133 n, 133 e D) 55 p, 133 n, 55 e E) 133 p, 55 n, 55 e

B) 55 p, 78 n, 55 e

What is the correct formula for cobalt(III) hydroxide? A) CoOH B) Co(OH)₃ C) Co₃OH D) Co₂(OH)₃

B) Co(OH)₃

Which has the incorrect name-formula combination? A) Sulfur dioxide - SO₂ B) Iodine trifluoride - IF C) Nitrogen tribromide - NBr₃ D) Silicon tetrafluoride - SiF₄

B) Iodine trifluoride - IF

What is the correct formula for barium phosphate? A) BaPO₄ B) Ba₂PO₄ C) Ba₂(PO₄)₃ D) Ba₃(PO₄)₂

D) Ba₃(PO₄)₂

*What is the correct formula for nickel(II) hypobromite? A) NiBrO B) Ni₂BrO C) Ni₃BrO D) Ni(BrO)₂

D) Ni(BrO)₂

Predict the chemical formula for the ionic compound formed by the elements Li and H

LiH

Write the chemical formula for sodium sulfite

Write the chemical formula for sodium sulfite Na₂SO₃

**Provide the correct IUPAC name for HBrO(aq).

hypobromous acid


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