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chemistry eoy y9
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Questions in this quiz (55)
1charge of protons
- A+1
- B-1
- C0
2the relative mass of electrons are [blank_start]1/1840[blank_end]
- A1/1840
3Protons and neutrons are located in the [blank_start]nucleus[blank_end]. Electrons are located in the [blank_start]shells[blank_end] around the [blank_start]nucleus[blank_end].
- Anucleus
- Bshells
- Cnucleus
4Mass number is on [blank_start]top[blank_end] . Atomic number is at the [blank_start]bottom[blank_end].
- Atop
- Bbottom
5Protons and electrons = [blank_start]atomic[blank_end] number
- Aatomic
6neutrons= [blank_start]mass[blank_end] number - [blank_start]atomic[blank_end] number
- Amass
- Batomic
7 An atom is the [blank_start]smallest part of an element[blank_end] . It has [blank_start]no charge[blank_end] due to having equal numbers of p[blank_start]rotons[blank_end] and e[blank_start]lectrons[blank_end] .
- Asmallest part of an element
- Bno charge
- Cprotons
- Delectrons
8the [blank_start]nucleus[blank_end] is the centre of an atom. the [blank_start]protons[blank_end] and n[blank_start]eutron[blank_end]s are tightly packed together so there is a [blank_start]positive[blank_end] charge .
- Anucleus
- Bprotons
- Cneutrons
- Dpositive
9electrons are found in [blank_start]shells orbiting the nucleus[blank_end]
- Ashells orbiting the nucleus
10electron configuration is arrangement of [blank_start]electrons[blank_end] in shells so use [blank_start]atomic[blank_end] number to calculate
- Aatomic
- Belectrons
11Isotopes are different [blank_start]atoms[blank_end] of the same [blank_start]element[blank_end] with the same number of protons and electrons but a different number of neutrons in the nucleus so the [blank_start]mass[blank_end] number is different.
- Aatoms
- Belement
- Cmass
12Ar is the w[blank_start]eighted[blank_end] [blank_start]mean[blank_end] mass of each atom of an element.
- Aweighted
- Bmean
13Ar= (abundance fraction [blank_start]x[blank_end] mass ) [blank_start]+[blank_end]( abundance fraction [blank_start]x[blank_end] mass)
- Ax
- B+
- Cx
14Mr/formula mass is mass of each [blank_start]molecule[blank_end]/ [blank_start]formula unit[blank_end].
- Amolecule
- Bformula unit
15[blank_start]CH4[blank_end]= mass of C + mass of Hx4
- ACH4
16Ions are formed when atoms gain or lose [blank_start]electrons[blank_end] . They do this to have full outer shell and be [blank_start]stable[blank_end] . Metal atoms [blank_start]lose[blank_end] electrons forming [blank_start]cations[blank_end] and nonmetal atoms [blank_start]gain[blank_end] electrons forming [blank_start]anions[blank_end]. An [blank_start]ionic compound[blank_end] is formed when electrons are transferred from a metal atom to a nonmetal atom during a reaction . An [blank_start]ion[blank_end] is an atom or group of atoms with positive or negative charge. An ionic bond is the [blank_start]electrostatic attraction[blank_end] between oppositely charged [blank_start]ions[blank_end].
- Aelectrons
- Bstable
- Close
- Dcations
- Egain
- Fanions
- Gionic compound
- Hion
- Ielectrostatic attraction
- Jions
17group 1 charge on ion- [blank_start]+1.[blank_end] grp 2 = +2 [blank_start]grp 3[blank_end]= +3 grp 4= [blank_start]no ion[blank_end]. grp 5= -3 grp 6= -2 grp 7= -1 grp [blank_start]8[blank_end]= no ion
- A+1
- Bgrp 3
- Cno ion
- D8
18-[blank_start]ide[blank_end] means element only. -[blank_start]ate[blank_end]/[blank_start]ite[blank_end] means element and [blank_start]oxygen[blank_end].
- Aide
- Bate
- Cite
- Doxygen
19[blank_start]compounds[blank_end] have no charge.
- Acompounds
20all anions end in [blank_start]ide[blank_end] [blank_start]ate[blank_end] or [blank_start]ite[blank_end]
- Aide
- Bate
- Cite
21covalent bond is [blank_start]sharing[blank_end] a pair of electrons between 2 [blank_start]non[blank_end] [blank_start]metal[blank_end] atoms
- Asharing
- Bnon
- Cmetal
22electrons needed for full outer shell = number of [blank_start]covalent[blank_end] [blank_start]bonds[blank_end] that can be formed.
- Acovalent
- Bbonds
23molecules are 2 or more atoms [blank_start]covalently[blank_end] bonded. they have no charge as they have = number of [blank_start]protons[blank_end] and electrons.
- Acovalently
- Bprotons
24acid is a compound that contains [blank_start]H+[blank_end] ions when [blank_start]dissolved[blank_end] in water.
- AH+
- Bdissolved
25A base is a substance that reacts with an [blank_start]acid[blank_end] to form [blank_start]salt[blank_end] and [blank_start]water[blank_end].
- Aacid
- Bsalt
- Cwater
26Alkalis are [blank_start]soluble[blank_end] bases. they contain [blank_start]OH-[blank_end] ions when dissolved in water.
- AOH-
- Bsoluble
27Neutralisation is the reaction between an [blank_start]acid[blank_end] and [blank_start]base[blank_end].
- Aacid
- Bbase
28the three common acids are HCl H2SO4 and [blank_start]HNO3[blank_end]
- AHNO3
29test for [blank_start]O2[blank_end] : glowing splint in gas jar should relight.
test for [blank_start]CO2:[blank_end] bubble gas in limewater and turn cloudy
test for [blank_start]H2[blank_end]: Lit splint in gas jar burns with squeaky pop.
test for [blank_start]N2[blank_end]: puts out a lit splint.- AO2
- BCO2
- CH2
- DN2
30Acid + metal -> salt + [blank_start]Hydrogen[blank_end]
metal reacts away with [blank_start]effervescence[blank_end]
gas burns with [blank_start]squeaky[blank_end] [blank_start]pop[blank_end]- AHydrogen
- Beffervescence
- Csqueaky
- Dpop
31Acid + base -> salt + [blank_start]water[blank_end]
copper chloride is [blank_start]green[blank_end]
copper sulphate is [blank_start]blue[blank_end]- Awater
- Bgreen
- Cblue
32Acid + [blank_start]metal carbonate[blank_end] -> salt + [blank_start]water[blank_end] + carbon dioxide
effervescence
limewater [blank_start]cloudy[blank_end]- Ametal carbonate
- Bwater
- Ccloudy
33Acid + alkali -> salt + [blank_start]water[blank_end]
with indicator: [blank_start]blue[blank_end] to [blank_start]green[blank_end]
without indicator: no [blank_start]visible[blank_end] change- Awater
- Bblue
- Cgreen
- Dvisible
34Ionic equation for acid alkali neutralisation:
H+(aq) + OH- (aq) -> [blank_start]H2O[blank_end](l)- AH2O
35[blank_start]solute[blank_end] is a substance that dissolves.
[blank_start]solvent[blank_end] is a substance that solute dissolves in
[blank_start]solution[blank_end] is a mixture of solute and solvent
[blank_start]aqueous[blank_end] solution is a mixture of solute dissolved in water.- Asolute
- Bsolvent
- Csolution
- Daqueous
36concentrated acid is larger amount of [blank_start]acid[blank_end] in certain amount of [blank_start]water[blank_end]
[blank_start]dilute[blank_end] acid is smaller amount of acid in certain amount of water.- Aacid
- Bwater
- Cdilute
37200 cm^3 : 10g
1 cm^3 : 10/200 g
1000cm^3: (10/200)x 1000 g
[blank_start]1000[blank_end]cm^3= 1dm^3- A1000
38preparation of salt using acid and insoluble base:
1) add base to acid until all [blank_start]acid is neutralised[blank_end]
2) filter to remove [blank_start]unreacted base[blank_end]
3)pour into an [blank_start]evaporating basin[blank_end]
4) heat until [blank_start]crystals[blank_end] start to appear
5) leave to cool and crystallise ( [blank_start]water[blank_end] evaporates)- Aacid is neutralised
- Bunreacted base
- Cevaporating basin
- Dcrystals
- Ewater
39preparation of salt using acid and soluble base:
1) pour alkali in a [blank_start]conical[blank_end] flask and use [blank_start]titration[blank_end] to see exact volume of [blank_start]methyl[blank_end] indicator.
2) repeat without [blank_start]indicator[blank_end]
3) pour in evaporating basin
4)heat until [blank_start]crystals[blank_end] appear
5)pour into [blank_start]crystallising[blank_end] dish.- Aconical
- Btitration
- Cmethyl
- Dindicator
- Ecrystals
- Fcrystallising
40Mendeleev arranged elements in order of i[blank_start]ncreasing[blank_end] [blank_start]relative[blank_end] [blank_start]atomic[blank_end] mass. He put elements with similar properties in the same [blank_start]vertical[blank_end] columns . There were some gaps in the table so he assumed that the elements hadn't been discovered . The later discovery of [blank_start]protons[blank_end] and a[blank_start]tomic[blank_end] numbers gave further evidence for his arrangement.
- Aincreasing
- Brelative
- Catomic
- Dvertical
- Eprotons
- Fatomic
41Metals have [blank_start]high[blank_end] melting points and [blank_start]high[blank_end] conductivity. Non metals have [blank_start]low[blank_end] melting points and they are [blank_start]insulators[blank_end].
- Ahigh
- Bhigh
- Clow
- Dinsulators
42all metal oxides/ bases form [blank_start]alkaline[blank_end] solutions when reacted with [blank_start]water[blank_end]
- Awater
- Balkaline
43all non metal oxides form [blank_start]acidic[blank_end] solutions when reacted with [blank_start]water[blank_end]
- Aacidic
- Bwater
44Grp 1 elements can be extracted from their compounds by [blank_start]reduction[blank_end] with carbon or carbon [blank_start]monoxide[blank_end]. they can be extracted from molten compounds using [blank_start]electrolysis[blank_end]. they are [blank_start]soft[blank_end] when cut, have [blank_start]low[blank_end] melting and boiling points due to [blank_start]weaker[blank_end] metallic bonding, react r[blank_start]apidly[blank_end] with water, float on water and fresh surface is shiny grey but tarnishes quickly as [blank_start]metal[blank_end] oxide forms.
- Areduction
- Bmonoxide
- Celectrolysis
- Dsoft
- Elow
- Fweaker
- Grapidly
- Hmetal
45Grp 1 elements [blank_start]increase[blank_end] in reactivity going down the grp as there are more [blank_start]shells[blank_end] so there's stronger shielding which means less [blank_start]energy[blank_end] is requires for the outer electron to be lost. as the [blank_start]atomic[blank_end] radius increases the [blank_start]attraction[blank_end] of the electron to the nucleus gets [blank_start]weake[blank_end]r.
- Aincrease
- Bshells
- Cenergy
- Datomic
- Eattraction
- Fweaker
46[blank_start]chlorine[blank_end] can be extracted by electrolysis of [blank_start]NaCl[blank_end] solution. Bromine and Iodine can be extracted from their salts by displacement using [blank_start]Cl2[blank_end] as it's more reactive.
- Achlorine
- BNaCl
- CCl2
47[blank_start]Cl2[blank_end] is green gas
[blank_start]Br2[blank_end] is a red/brown liquid
[blank_start]I2[blank_end] is a purple/grey solid- ACl2
- BBr2
- CI2
48Grp 7 elements have [blank_start]low[blank_end] melting and boiling points as they are simple [blank_start]covalent[blank_end] molecules and only [blank_start]weak[blank_end] intermolecular forces need to be overcome. Melting and boiling point increases going [blank_start]down[blank_end] the grp because as molecules get bigger, the intermolecular forces get [blank_start]stronger[blank_end] since there are more [blank_start]electrons[blank_end] in the molecules.
- Alow
- Bcovalent
- Cweak
- Ddown
- Estronger
- Felectrons
49in halogen displacement reactions the [blank_start]more[blank_end] reactive halogen displaces the [blank_start]less[blank_end] reactive one
- Amore
- Bless
50the test for chlorine - damp [blank_start]blue[blank_end] litmus turns [blank_start]red[blank_end] then [blank_start]bleaches[blank_end] white.
Most elements burn in chlorine to form [blank_start]chloride[blank_end]. halogens react with hydrogen forming [blank_start]hydrogen halides[blank_end]. they are gases at room temp and dissolve in water to form [blank_start]acidic[blank_end] solutions.- Ablue
- Bred
- Cbleaches
- Dchloride
- Ehydrogen halides
- Facidic
51chlorine kills [blank_start]bacteria[blank_end], bleaches [blank_start]paper,[blank_end] produces anaesthetics and antiseptics.
- Abacteria
- Bpaper
52grp 7 elements [blank_start]decrease[blank_end] in reactivity down the periodic table coz in order to gain a full outer shell they need one electron and going down the grp the [blank_start]atomic radius[blank_end] increases so more energy is required to gain the electron. Also there are more shells so increases shielding of electron attraction from [blank_start]nucleus[blank_end].
- Adecrease
- Batomic radius
- Cnucleus
53half equation for bromine reacting to form [blank_start]bromide[blank_end] ions: Br2+2e->2Br-
half equation for [blank_start]iodide[blank_end] ins reacting to form iodine : 2I- -> I2 +2e- Abromide
- Biodide
54Noble gases have full outer shell of electrons so don't react except under extreme circumstances and exist as [blank_start]single[blank_end] atoms. They are obtained by [blank_start]fractional[blank_end] distillation of [blank_start]liquid[blank_end] air. Melting and boiling points [blank_start]increase[blank_end] down the group as the [blank_start]strength[blank_end] of the weak forces increase, more [blank_start]energy[blank_end] is required to separate the atoms and the atoms have [blank_start]more[blank_end] electrons. the [blank_start]density[blank_end] also increases going down the group.
- Asingle
- Bfractional
- Cliquid
- Dincrease
- Estrength
- Fenergy
- Gmore
- Hdensity
55helium is used in [blank_start]weather[blank_end] balloons as it has low [blank_start]density[blank_end] and is not [blank_start]flammable[blank_end]. Argon is used in [blank_start]welding[blank_end] because it's an [blank_start]inert[blank_end] gas and stops molten metal from [blank_start]oxidising[blank_end]. Neon is used in [blank_start]fluorescent[blank_end] lights as it glows when electricity is passed through it. Kr/ Xe can be used as the [blank_start]atmosphere[blank_end] in lightbulbs as they are inert gases and the hot [blank_start]flamment[blank_end] in the bulb doesn't burn.
- Aweather
- Bdensity
- Cflammable
- Dwelding
- Einert
- Foxidising
- Gfluorescent
- Hatmosphere
- Iflamment
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- Quiz on chemistry eoy y9, created by Lakshmi Lakshmanan on 26/05/2019.
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- Lakshmi Lakshmanan
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