Chapter 5- Molecules and Compounds

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Chemistry

•

University

•

Medium

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NGSS

MS-PS1-1, HS-PS1-1, HS-PS1-8

Standards-aligned

Luis Bello

Used 24+ times

FREE Resource

29 Slides • 26 Questions

Chapter 5- Molecules and Compounds

Previous Chapter 4

4.2 Indivisible: The Atomic Theory

4.3 The Nuclear Atom

4.4 The Properties of Protons, Neutrons, and Electrons

4.5 Elements: Defined by Their Numbers of Protons

4.6 Looking for Patterns: The Periodic Law and the Periodic Table

4.7 Ions: Losing and Gaining Electrons

4.8 Isotopes: When the Number of Neutrons Varies

4.9 Atomic Mass: The Average Mass of an Element’s Atoms

Checking Comprehension Chapter 4

Multiple Choice

What is the atomic number?

the number of protons

the number of protons and neutrons

the number of neutrons

the number of protons and electrons

Multiple Choice

What is the mass number defined as?

the number of protons

the number of protons and neutrons

the number of neutrons

the number of protons and electrons

Multiple Choice

An element has the mass number 12 and atomic number 6. The number of neutrons in it is:

Multiple Choice

How many protons are in a sodium atom (Na)?

Sodium has 16 protons.

Sodium has 12 protons.

Sodium has 11 protons

Sodium has 22 protons

Multiple Choice

What is the mass number of this atom?

Multiple Choice

What is the atomic number of this atom?

Multiple Choice

When an atom loses a valence electron, it becomes a(n) _____________ ion.

positive

negative

neutral

polyatomic

Multiple Choice

Ions are:

atoms with a positive or negative charge

atoms with no charge

atoms with ONLY a positive charge

atoms with ONLY a negative charge

Multiple Choice

Mg ionizes to a charge of ______.

-1

-2

Multiple Choice

Be ionizes to a charge of ________.

-1

-2

Multiple Choice

Na ionizes to a charge of _______

-1

-2

Multiple Choice

A row on the Periodic Table of Elements

family

period

row

isotope

Multiple Choice

A grouping of elements based on similar chemical properties, arranged by columns in the periodic table; also known as a group

family

period

row

isotope

Multiple Choice

Periodic law states that the elements are arranged according to their atomic ________ so that elements with similar chemical properties are in the same ________ and properties repeat periodically.

numbers, rows

masses, rows

masses, column

numbers, column

Brief description

Chapter 5 introduces predicting and writing chemical formulas. You will also learn how to derive the name of a molecule from the formula and the type of species. The naming of ionic compounds, molecular compounds, and acids will be explained

Chapter topics

5.2 Compounds Display Constant Composition

5.3 Chemical Formulas: How to Represent Compounds

5.4 A Molecular View of Elements and Compounds

5.5 Writing Formulas for Ionic Compounds

5.6 Nomenclature: Naming Compounds

5.7 Naming Ionic Compounds

5.8 Naming Molecular Compounds

5.9 Naming Acids

5.10 Nomenclature Summary

5.11 Formula Mass: The Mass of a Molecule or Formula Unit

Compounds Display Constant Composition

The law of constant composition says that, in any particular chemical compound, all samples of that compound will be made up of the same elements in the same proportion or ratio. For example, any water molecule is always made up of two hydrogen atoms and one oxygen atom in a 2:1 ratio.

Chemical Formulas: How to Represent Compounds

Writing Formulas for Ionic Compounds

Naming Ionic Compounds

Naming Molecular Compounds

Naming Acids

Naming Bases

Formula Mass: The Mass of a Molecule or Formula Unit

Multiple Choice

Titanium(IV) oxide has the formula

Ti₄O

TiO₄

Ti(IV)O

TiO₂

Ti₄O₂

Multiple Choice

Which of the following formulas is

incorrect?

CaNO₃

MgS

AlBr₃

Li₂O

NaOH

Multiple Choice

Which of the following is not the correct

combination of compound name and its formula?

hydrobromic acid; HBr

calcium sulfate; CaSO₄

beryllium oxide; BeO

nickel(II) peroxide; Ni₂O

ammonium chromate; (NH₄)₂CrO₄

Multiple Choice

The charge on a lithium ion in its ionic

compound is _____.

-1

Varies

Multiple Choice

The correct name for FeO is _____.

iron oxide

iron (II) oxide

iron (III) oxide

iron (IV) oxide

iron (I) oxide

Multiple Choice

The correct name for LiCl is _______.

lithium monochloride

lithium(I) chloride

monolithium chloride

lithium chloride

monolithium monochloride

Multiple Choice

Which of the following is a binary

compound?

O₂

HCN

H₂SO₄

H₂S

NaOH

Multiple Choice

What is the mass of one mole of aluminum chloride (remember to determine the correct formula first)?

62.435g

116.399g

133.341g

97.888g

Multiple Choice

Sodium hydroxide is used in many industries: in the manufacture of pulp and paper, textiles, drinking water, soaps and detergents, and as a drain cleaner. What is the molar mass of NaOH?

40 amu

38.989 amu

23.998 amu

57.004 amu

Multiple Choice

What is the molar mass of table salt (NaCl)?

116.886 g/mol

35.453 g/mol

22.990 g/mol

58.443 g/mol

Multiple Choice

Fluorine is added to city water supplies in the proportion of about one part per million to help prevent tooth decay. Several fluoride compounds are added to toothpaste, also to help prevent tooth decay. What is the molar mass of fluorine gas?

18.998 amu

38 amu

9 amu

18 amu

Multiple Choice

Silicon dioxide, also known as silica, is an oxide of silicon with the chemical formula SiO_2.Silica is one of the most complex and most abundant families of materials, existing as a compound of several minerals and as synthetic product. What is the formula mass of the covalent compound silicon dioxide (SiO₂)?

7193.6 amu

30.0 amu

44.1 amu

60.1 amu

Chapter 5- Molecules and Compounds

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