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Chemistry > chapter 7 test > Flashcards

chapter 7 test Flashcards

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1
Q

What is a chemical bond

A

the force that holds two atoms together

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2
Q

what is an ionic bond

A

bonds between oppositely charged ions

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3
Q

cations

A

positive ions

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4
Q

anions

A

negative ions

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5
Q

Octet rule

A

atoms will gain or lose electrons to achieve a noble-gas configuration. (8 valence electrons, stable)

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6
Q

metals tend to - electrons

A

lose

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7
Q

non-metals tend to - electrons

A

gain

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8
Q

atoms gain or lose electrons to

A

fill their octet

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9
Q

when atoms gain or lose electrons they now have a

A

charge

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10
Q

a diatomic molecule is made of

A

two or more same type of atoms which are chemically bonded

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11
Q

how many diatomic molecules exist in nature and what are they

A

7; hydrogen, oxygen, nitrogen, fluorine, bromine, chlorine, and iodine

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12
Q

ionic bonds occur between a - and a -

A

metal and a non-metal

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13
Q

salts are formed when

A

alkali metals and alkali earth metals bond with halogens

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14
Q

when a metal forms a bond with oxegyn - are formed

A

oxides

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15
Q

binary compounds contain - elements

A

two

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16
Q

monoatomic means

A

containing one atom

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17
Q

polyatomic ions are composed of

A

more than two elements

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18
Q

ionic compounds are hard or soft

A

hard

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19
Q

ionic compounds are mallueble or brittle

A

brittle

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20
Q

ionic compounds have high/lowboliling and melting points

A

high

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21
Q

ionic solids do/do not conduct electricity

A

do not

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22
Q

ionic liquids and solutions do/do not conduct electricity

A

do

23
Q

Aqueous solutions that are conductive are called

A

electrolytes

24
Q

Metals form - similar to ionic compounds

A

lattices

25
Q

cations in metallic bonds are surrounded by

A

a sea of freely moving valence electrons

26
Q

metallic bonding involves attraction to

A

oppositley charged particles

27
Q

netallic bonds do not involve losing

A

electrons

28
Q

in metallic bonds outer energy levles

A

overlap

29
Q

free moving electrons are also called

A

delocalized electrons

30
Q

a metallic bond is the attraction of a cation to

A

freely moving electrons

31
Q

metallic bonds have - boiling and melting points

A

relativley high

32
Q

metals can conduct electricity because

A

of the sea of electrons

33
Q

melting and boiling points of metals

A

vary greatly

34
Q

one metal is a liquid at room temp

A

hg

35
Q

metals are

A

durable, malleble, ductile, good thermal and electrical conductrors, hard and strong

36
Q

An alloy is

A

a metallic homogenous solution

37
Q

some metal alloys include

A

steel, bronze, brass, pewter, and chrome

38
Q

steel is made of

A

carbon and iron

39
Q

alloys are possible because metals can be deformed

A

without breaking

40
Q

alloys are either

A

substitutional or intersitial

41
Q

substitutional alloy

A

atoms of one atom are replaced by another

42
Q

substitutional example

A

sterling silver

43
Q

intersitial alloy

A

holes in one atom are filled by smaller particles of the other atom

44
Q

intesitial example

A

steel

45
Q

heavy metals are called hevy because

A

they have a higher atomic mass than essential metals like Ca and Fe

46
Q

heavy metals include

A

Lead, Mercury, Cadnium

47
Q

heavy metals are toxic and deadly. They take you down by

A

binding to the protiens in your body

48
Q

an atom that has the same number of protons but different mass

A

isotope

49
Q

Roman numerals are used to represent metals that form more than one cation.

Example: W (II)

A

oxidation number

50
Q

what does isoelectronic mean

A

they have the same electron configuration

51
Q

An atom is different from an ion because of its

A

charge

52
Q

how to find the number of valence electrons an element has

A

group number

53
Q

how to find the number of core electrons an element has

A

subtract valence number from total atomic number.

Chemistry (6 decks)

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