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Flashcards in Chemistry Deck (32):
1

Ammonia

NH3

2

Methane

CH4

3

Ozone

O3

4

Hydrogen Peroxide

H2O2

5

Prefixes

Mono, di, tri, tetra, penta, hexa

6

Metal + water

Base + H2

7

Metal + acid

Ionic compound + H2

8

Neutralization reaction

Acid + base = salt + water

9

Combustion reaction

CxHy + O2 = CO2 + H2O

10

Exothermic

Reactants = products + heat

11

Endothermic

Reactants + heat = products

12

Water

H2O

13

Compound: def

a pure substance composed of 2 or more elements in a fixed ratio

14

What do the numbers on ionic compound formula tell you?

How many atoms of each element are needed to make the compound neutral

15

Molecule

a particle in which atoms are joined by covalent bonds

16

Covalent bond: how?

- when 2 non-metals bond with each other, both nuclei form strong attractions for the other's electrons
- neither atom attracts electrons strongly enough to pull it away
- result: sharing

17

___________ arrow _______

Left = reactants
Right = products

18

What is the law of conservation of mass?

In any given chemical reaction, the total mass of the reactants equals the total mass of the products

19

Why must we balance chemical equations?

- during chemical reaction, atoms in reactant molecules rearrange to form products
- therefore all atoms that existed in reactants are still present in products because atoms can't be created or destroyed
- to be accurate, we must show that there are equal # of each atom before and after chemical reaction has taken place

20

Oxyacids

- Hydro _________(polyatomic acids)

21

What does pH scale indicate? What does neutral mean?

- concentration of hydroxide or hydrogen ions
- neutral means that the concentrations are equal and balance each other out

22

bonds?

outer shells collide to have a more stable electron arrangement.

23

Why don't you reduce in molecular?

- ionic: ratio of elements in compound
- molecular: actual # of each atom in molecule (change it and it will be different molecule)

24

How to neutralize an acid?

add indicator and add base until indicator changes colour

25

Metals characteristics

- solid
- shiny
- conductor
- malleable

26

Non-metals characteristics

- solid/liquid/gas
- dull
- not conductor
- brittle, not ductile

27

Reactivity trends?

- Metals: as you go down and left, electron is further from nucleus which means less energy to lose electron
- Nonmetals: stronger P charge, more attractive

28

Period #

# of orbits

29

Group #

# of valence electrons

30

Ionic bond

Attraction between metal cation and non-metal anion

31

Acids properties

- corrosive
- soluble in water
- sour
- turn litmus paper red
- good conductors when dissolves

32

Bases properties

- corrosive
- soluble in water
- bitter
- slippery
- turn litmus paper blue
- good conductors when dissolved in water