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sienxe exam > chemistry > Flashcards

chemistry Flashcards

1
Q

the oppsite of a decomposition reaction is?

A

synthasys

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2
Q

what’s dose the aarow in a chemical equation mean

A

that a change is taking place

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3
Q

state the 2 elements that are liquide at room temp

A

mercury and bromine

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4
Q

what is nutrel atoms or ions

A

atoms

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5
Q

describe the bonding ablity of the elements in the far right hand colom

A

noble gasses don’t usually bond

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6
Q

when none mental atoms they what to becom what

A

gaine E to becom anions

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7
Q

what is a covelnt compound

A

covelnt is non metals they share valence electrons ends in ide

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8
Q

what is an ionic bonds

A

metal + none metal
valence electrons are shared
ends in ide

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9
Q

what is a metallic compound

A

valence electrons scatter and délocalise
ends in ide

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10
Q

what is the law of conservation of mass

A

of product atoms = #of reactient atoms

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11
Q

what’s the difrwnxe between a. lewis dot digagram and a bore rutherford

A

bord rutherford has all the election shells lewis dot just has the valence shells

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12
Q

what is a double displacement reaction

A

XY+WZ= XZ+WY

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13
Q

what is acid base nutrilizion reaction

A

an acid and base comw together to form water and salt

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14
Q

what’s is a synthasisy reaction

A

A+B=AB

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15
Q

what’s the difrwnxe between compleate and incomplete combustion

A

compleate = enugh oxogyn
icompleate=not enugh
incomplete causes carbon monoxide (sut) to be released beacuse it didn’t burn

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16
Q

what are the products of combustion

A

CO^2 H^2O in compleate when incomplete also CO (sut)

17
Q

what do you need for combustion

A

a hydrocarbon and oxogyn

18
Q

acid + base

A

salt + water

19
Q

when you react a acid and a base what’s the reaction called

A

nutrulization

20
Q

what dose PH stand for

A

power of hydrogen

21
Q

what’s the PH of a nutrel substance

A

7

22
Q

> 7 is

A

a base

23
Q

<7 is

A

more acidic

24
Q

another word for basic is

A

alkaline

25
Q

what color dose bromothyl blue turn in a base

A

blue

26
Q

cation vs anion

A

cation is positive anion is negitive

27
Q

what color dose phenophaline turn in à base

A

pink

28
Q

are all acids liquids

A

NO!

29
Q

do both acids and bases conduct electricity

A

YES!

30
Q

acids relance cations T/F

A

T

31
Q

acids have a pungunt smell T/F

A

T

32
Q

examples of edible acids

A

vinaigre
orange juice
citric acid

33
Q

examples of edible basis

A

baking soda
lime watee

34
Q

rules of naming acids

A

change IDE to IC
add hydro prefix
add the word acid to the end

sienxe exam (4 decks)

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