Free Printable Ch 8 - Elements and Chemical Bonds

Worksheets

Ch 8 - Elements and Chemical Bonds

Total questions: 25

Worksheet time: 4hrs 6mins

Name

Class

Date

Define chemical bond.

is not a force but holds the elements together through a chemical reaction

is a non-contact force to holds two or more atoms together

is a force that holds two or more atoms together

Define valence electron.

an innermost electron of an atom that participates in chemical bonding

an outermost electron of an atom that participates in chemical bonding

an outermost electron of an atom, they do not participate in chemical bonding

Which one is an electron dot diagram?

Define covalent bond.

is a ionic bond formed when two atoms share one or more pairs of valence electrons.

is a chemical bond formed when two atoms share one or more pairs of valence electrons.

is a metallic bond formed when two atoms share one or more pairs of valence electrons.

Define molecule.

a group of ions held together by ionic bonding that acts as an independent unit

a group of metals held together by metallic bonding that acts as an independent unit

a group of atoms held together by covalent bonding that acts as an independent unit

What is a polar molecule?

a molecule that has a partial + and a partial - end, because of unequal sharing of electrons

a molecule that is all positive

a molecule that is all negative

What is a chemical formula?

a group of numbers that represent the number of atoms of each element that makes up a compound

a group of chemical symbols and numbers that represent the elements and the number of atoms of each element that makes up a compound

What is an ion?

an atom that is positively charged

an atom that is negatively charged

an atom that is no longer electrically neutral because it has lost or gained VE

What is an ionic bond?

the attraction of two + charged ions

the attraction between + and - charged ions in an ionic compound

the attraction of two - charged ions

10.

What is a metallic bond?

a bond formed when many metal atoms share their pooled VE

a bond formed when many ions share their pooled VE

11.

Why do ionic bonds form?

so the number of protons equals the number of electrons

to fill the outermost energy level

so an atom can become unstable

12.

An electron has what kind of charge?

no charge

positive

negative

it depends

13.

A proton has what charge?

positive

negative

no charge

it depends

14.

When the number of electrons equals the number of protons the atom has what charge?

sponge bob

positive charge

negative charge

neutral charge

15.

An atom that has gained or lost electrons is called ...

a winner

an isotope

an ion

a loser

16.

For an atom to LOSE and electron what has to be broken?

The attraction between the electrons and protons

the attraction between the electrons and neutrons

The attraction between the protons

The attraction between the electrons

17.

If an aluminum atom has 13 protons (+) and 10 electrons (-), what is it's charge?

Al³⁺

Al¹³⁺

Al¹⁰⁺

Al^10-

18.

If an oxygen atom has 8 protons (+) and 10 electrons (-), what is it's charge?

O^10-

O⁸⁺

O^2-

O¹⁰⁺

19.

All chemical bonds involve two atoms sharing electrons.

True

False

20.

Chemical bonds form when atoms

combined nuclei

give up neutrons

gain protons

share or transfer electrons

21.

If an atom loses two electrons what charge will it have?

+ 2

- 2

-1

22.

If an atom gains one electron what charge will it have?

-2

-1

23.

Covalent compounds

Share electrons

transfer electrons

contain a sea of electrons

conduct electricity

24.

How many valence electrons in this structure?

25.

A bond that forms when electrons are transferred is called a/an

ionic bond

covalent bond

hydrogen bond

100 %

Ch 8 - Elements and Chemical Bonds

Total questions: 25

Worksheet time: 4hrs 6mins

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