Ch. 7,8,9 Test Flashcards Preview

Chem Unit 7, 8, 9 > Ch. 7,8,9 Test > Flashcards

Flashcards in Ch. 7,8,9 Test Deck (47)
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1

Naming covalent compounds
Prefix for 1

Mono

2

Naming covalent compounds
Prefix for 2

Di

3

Naming covalent compounds
Prefix for 3

Tri

4

Naming covalent compounds
Prefix for 4

Tetra

5

Naming covalent compounds
Prefix for 5

Penta

6

Naming covalent compounds
Prefix for 6

Hexa

7

Naming covalent compounds
Prefix for 7

Hepta

8

Naming covalent compounds
Prefix for 8

Octa

9

Naming covalent compounds
Prefix for 9

Nona

10

Naming covalent compounds
Prefix for 10

Deca

11

Chemical Bond

The force holding atoms together in a compound or molecule

12

Types of Bonds

Ionic
Covalent (polar/nonpolar)
Metallic

13

Octet Rule

Atoms tend to lose or gain electrons to obtain the same electron configuration as a noble gas

14

Cations

Atoms who lose electrons
Metals
Positive Charge

15

Anions

Atoms that gain electrons
Nonmentals
Negative Charge

16

Ionic Bond

The electrostatic forces that bring a cation and anion together.
A transfer of electrons that results in a positive and negative ion

17

Ionic Bonds ... Known as..

Salts

18

Ionic bond electronegativity is ...

greater than two

19

Properties of ionic compounds

Soluble in water
Conduct electric current in molten or soluble state
High melting points

20

Metallic Bonds

form when metal atoms crowd together and valence shells overlap

21

Valence electrons in metallic bonds

Become "delocalized"
Like a "sea of electrons" flowing through positively charged metal ions

22

Properties of metals

Conduct electricity
Malleable and ductile
Insoluble

23

Ions

charged particles

24

Monatomic Ion

formed when a single atom has gained or lost electrons

25

Polyatomic Ion

When a group of atoms collectively has a charge

26

Multivalent Ions

Transition Metals
Uses stock system to name (indicated by Roman Numeral)

27

Exceptions to multivalent roman numeral rule

Silver +1
Zinc +2
Scandium +3
Cadmium +2

28

Naming Binary Compounds

Cation named first, anion named second (ending in -ide)

29

Naming Multivalent Binary Compounds

Criss cross method, make it so the ion is neutral
Put Roman Numeral in name

30

Single covalent bonds

two atoms are held together by sharing a pair of electrons
1 covalent bond = 1 shared pair

31

all halogens form ____________ bonds

single covalent

32

unshared pair

pair of valence electrons that is not shared between atoms
do not connect 2 atoms together
"lone pair of electrons"

33

strongest bond

triple

34

VSEPR Theory

Repulsion between electron pairs causes molecular shapes to adjust so that the valence-electron pairs stay as far apart as possible

35

Molecule with electronegativity of 0.0-0.4

Nonpolar covalent

36

Molecule with electronegativity of 0.4-2.0

Polar covalent

37

Molecule with electronegativity larger than 2.0

Ionic

38

If a molecule is symmetrical.,,,

It is a nonpolar molecule

39

If a molecule is NOT symmetrical...

It is a polar molecule

40

Naming acids where the molecule ends in -ide

hydro_____ic + acid

41

Naming acids where the molecule ends in -ate

_____ic + acid

42

Naming acids where the molecule ends in -ite

______ous + acid

43

Ionic compounds exist as ______ at room temperature

solids

44

Properties of a covalent compound

low melting and boiling point, not conductors, insoluble

45

polar bond

electrons unequally shared

46

nonpolar bond

electrons equally shared

47

Diatomic Molecules

H2, O2, N2, Cl2, Br2, I2, F2