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Physical Science > C18 Terms > Flashcards

C18 Terms Flashcards

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1
Q

octet rule

A

Atoms are generally the most stable when they have eight electrons

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2
Q

electron affinity

A

A measure of how well atoms attract and hold electrons

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3
Q

electronegativity

A

A scale to compare an atoms ability to attract and hold atoms

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4
Q

covalent bond

A

A chemical bond in which two atoms usually nonmetals share a pair of electrons

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5
Q

ionic bond

A

A chemical bind formed by the electrostatic attraction of oppositely charged ions

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6
Q

metallic bond

A

A chemical bond characteristic of metals in which the atoms freely share their few valence electrons with all the other atoms

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7
Q

Lewis structure

A

A pair of dots between the symbols

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8
Q

double bond

A

When each atom shares two electrons

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9
Q

triple bond

A

When each atom shares three electrons

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10
Q

polyatomic molecule

A

Molecules of three or more atoms

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11
Q

polar covalent bond

A

Uneven electron sharing

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12
Q

nonpolar bond

A

When diatomic elements form bonds with no polarity

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13
Q

covalent compound

A

Consist of covalently bonded molecules

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14
Q

ionic compound

A

Substances formed by ionic bonds

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15
Q

crystal latticework

A

An orderly pattern appears as positive and negative ions line up

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16
Q

formula unit

A

The smallest ratio of elements in an ionic compound that describes its chemical composition

17
Q

unit cell

A

When ionic crystal lattices are formed

18
Q

electrolyte

A

A substance that produces ions when it dissolves in a liquid

19
Q

electron sea theory

A

Where electrons float between atoms

20
Q

free electron theory

A

Where electrons float between atoms

21
Q

Why do atoms form chemical bonds?

A

The arrangement and number of electrons

22
Q

What are the two main ways atoms can acquire a full outer energy level?

A

Idk

23
Q

(True or false) the type of chemical bond between atoms often determines many of the chemical and physical properties of an element or compound.

A

True

24
Q

How is electron dot notation useful for predicting the number of covalent bonds a nonmetal atom can form?

A

It shows the dot and arranges them

25
Q

Which of the following molecules contain polar bonds? Which has the most polar?

A

A, B

26
Q

What class of elements forms covalent compounds?

A

The oxogen family

27
Q

What makes certain combinations of atoms form ionic bonds rather that other kinds of bonds?

A

Idk

28
Q

Where will the bonding electrons most likely be found in an ionic bond?

A

In the atoms

29
Q

Why is a purely ionic bond impossible in an ionic compound?

A

The electron forces are not equall

30
Q

Compare the polarity of a pure covalent bond with that of an ionic bond.

A

They are different

31
Q

How are particles arranged in an ionic bond?

A

Idk

32
Q

Why does the octet rule not apply to iron atoms when they bond to other atoms?

A

Because the electrons are not held in one place

33
Q

Name and describe the model that accounts for metallic bonding

A

The electron sea theory, where electrons float between atoms

34
Q

What property of metallic bonds affects the thermal and electrical conductivity of metals?

A

The atom structure

35
Q

Why are metals shiny?

A

Because of the atom structure

36
Q

Why does the octet rule not apply to iron atoms when they bond to other atoms?

A

Because the electrons are not held in one place

36
Q

Name and describe the model that accounts for metallic bonding

A

The electron sea theory, where electrons float between atoms

36
Q

What property of metallic bonds affects the thermal and electrical conductivity of metals?

A

The atom structure

36
Q

Why are metals shiny?

A

Because of the atom structure

Physical Science (20 decks)

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