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yr 10 science test > quantitative chemistry > Flashcards

quantitative chemistry Flashcards

3 or 2 = cubed or squared e.g cm3 = cm cubed

1
Q

what is an atom

A

the smallest part of a substance that can exist

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2
Q

what are the 3 subatomic particles in an atom

A

protons,neutrons and electrons

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3
Q

what is the mass of a proton

A

1

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4
Q

what is the mass of an electron

A

very small

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5
Q

what is the mass of a neutron

A

1

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6
Q

what is the charge of a proton

A

+1

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7
Q

what is the charge of an electron

A

-1

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8
Q

what is the charge of an electron

A

0/Neutral

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9
Q

what does the top number of an element represent

A

the atomic mass / number of protons plus the number of neutrons

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10
Q

what does the bottom number of an element represent

A

the atomic number/ number of neutrons

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11
Q

what does the mass number tell us about the atom

A

the number of protons plus the number of neutrons

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12
Q

if sodium is in group 1, what is the charge on its ion

A

+1

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13
Q

if oxygen is in group 6, what is the charge on its ion

A

-2

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14
Q

whats the formula of sodium oxide

A

Na2O

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15
Q

whats the formula of a Hyrdroxide ion

A

OH-

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16
Q

whats the formula of a carbonate ion

A

CO3-2

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17
Q

whats the formula of a sulphate ion

A

SO4-2

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18
Q

whats the formula of a nitrate ion

A

NO3

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19
Q

whats the formula of aluminium nitrate

A

Al(NO3)3

20
Q

what are the 3 states of matter

A

solid ,liquid and gas

21
Q

particle arrangement in a solid

A

the particles pack together as tightly as possible in a neat and ordered arrangement.The particles are held together too strongly to allow movement from place to place but the particles do vibrate about their position in the structure.

22
Q

particle arrangement in a liquid

A

in a random way, and are close together, touching many of their neighbours,cannot usually be compressed or squashed.

23
Q

particle arrangement in a gas

A

widely spaced and randomly arranged, meaning they can be easily compressed or squashed

24
Q

law of conservation of mass

A

no atoms are destroyed or created during a chemical reaction.

25
Q

relative atomic mass [Ar]

A

the average mass of an atom of an element

26
Q

relative formula mass[Mr]

A

sum of all the atomic masses of the atoms in a formula of a substance

27
Q

uncertainty

A

the interval within which the true value can be expected to lie

28
Q

concentration

A

a measure of the number of particles of a chemical in a volume,can be measured in g/dm3

29
Q

Decimeter3 [dm3]

A

a measurement of volume,contains 1000cm3

30
Q

decimeter cubed

A

dm3

31
Q

concentration

A

[g/dm3]

32
Q

concentration [g/dm3]

A

mass of solute(g) ÷ volume (dm3)

33
Q

centimeters cubed

A

cm3

34
Q

concentration (g/dm3)

A

mass of solute(g) x 1000 ÷ volume (cm3)

35
Q

when a metal forms a metal oxide , why does the mass increase

A

atoms form gaseous oxygen have been added

36
Q

when an acid reacts with a metal,why does the mass decrease

A

hydrogen gas is produced and escapes

37
Q

what is the symbol used for relative formula mass

A

Mr

38
Q

what is a unit for concentration

A

g/dm3 or mol/dm3

39
Q

which formula relates concentration, mass, and volume

A

concentration = mass ÷ volume

40
Q

how many cm3 is in 1 dm3

A

1000 cm3

41
Q

if the amount of solute in a solution is increased, what happens to its concentration

A

increases

42
Q

if the volume of water in a solution is increased,what happens to its concentration

A

decreases

43
Q

name 3 apparatus used to measure volume

A

measuring cylinder, burette ,pipette

44
Q

which apparatus is the least accurate , measuring cylinder or pipette

A

measuring cylinder

45
Q

key word to describe a solid dissolved in a liquid

A

solute

46
Q

key word to describe the liquid that dissolves a solid

A

solvent

47
Q

a solution contains which solvent

A

water

yr 10 science test (3 decks)

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