9th Week 12 Reading Homework

9th Week 12 Reading Homework

by Rachel Wold

​CK-12 Readings

• ​Chemical Bond

• ​Chemistry of Compounds

• ​Chemical Formula

• ​Ionic Bond

• ​Ionic Compound

• ​Covalent Bond

• ​Molecular Compounds

Chemical Bond

​

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Multiple Choice

A chemical bond is a force of attraction between atoms or ions.

• True

• False

Multiple Choice

There are __ types of chemical bonds.

• 1

• 2

• 3

• 4

Multiple Choice

In a _____ bond electrons are shared.

• covalent

• ionic

• metalic

• polar

Multiple Choice

A(n) _____ bond is the force of attraction that holds together oppositely charged ions.

• covalent

• ionic

• metalic

• polar

​Chemistry of Compounds

​

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Multiple Choice

A(n) _____is a unique substance that forms when two or more elements combine chemically.

• element

• atom

• alloy

• compound

Multiple Choice

Lemonade is an example of a mixture.

• True

• False

​Chemical Formula

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Multiple Choice

A ______ multiples the number of atoms in a compound.

• subscript

• superscript

• coefficient

• multiplier

Multiple Choice

There are different rules for writing the chemical formulas for ionic and covalent compounds.

• True

• False

Multiple Choice

the ratio of different elements is represented by coefficients.

• True

• False

​Ionic Bond

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Multiple Choice

An ionic bond forms when atoms of a nonmetallic element give up electrons to atoms of a nonmetallic element.

• True

• False

Multiple Choice

Energy is _____ when an atom gains valence electrons and forms a negative ion.

• absor

• released

• adsorbed

• used

​Ionic Compound

​

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Open Ended

Why does calcium chloride lower the freezing point of water?

Fill in the Blanks

Ionic compounds are solids with

melting and boiling points.

Multiple Choice

It takes a lot of ____ to break ionic bonds.

• electrons

• energy

• protons

• photons

​Covalent Bond

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Multiple Choice

the force of attraction that holds together two atoms that share a pair of valence electrons

• ionic bond

• molecular bond

• metaline bond

• covalent bond

Multiple Choice

Covalent bonds form only between atoms of nonmetals.

• True

• False

Open Ended

Why do covalent bonds form?

​Molecular Compounds

​

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Multiple Choice

the smallest particle of a covalent compound that still has the properties of the compound

• atom

• molecule

• element

• mole

Fill in the Blanks

The prefix for the number 4 is

.