IB Chemistry Terms

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HL IB Chemistry important terms

64 Terms

1

solid to gas

Sublimation

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2

attractive forces that exist between particles

intermolecular forces

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3

gas to solid

Deposition

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4

pure substance that is made up of only one type of atom and can't be broken down

Elements

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5

pure substance composed of two or more different elements that are chemically combined.

Compound

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6

two or more atoms chemically bonded together

Molecule

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7

A combination of two or more substances that are not chemically combined

Mixture

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8

a mixture that is uniform in composition; components are evenly distributed and not easily distinguished

homogeneous mixture

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9

A mixture that is not uniform in composition; components are not evenly distributed throughout the mixture

heterogeneous mixture

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10

technique that is used to separate the components of a mixture based on their different boiling points.

Fractional distillation

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11

A substance that is dissolved in a solution.

solute

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12

the substance in which the solute dissolves

Solvent

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13

(chemistry) a process in which one or more substances are changed into others

chemical reaction

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14

a principle stating that mass cannot be created or destroyed.

conservation of mass

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15

mass of an atom of an element relative to 1/12th of the mass of carbon-12

Relative atomic mass

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16

Atoms of the same element that have different numbers of neutrons

isotopes

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17

an instrument that is used to determine the molecular weight of a compound

mass spectrometer

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18

the SI base unit used to measure the amount of a substance

mole

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19

a formula with the simplest whole-number ratio of elements in a compound

empirical formula

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20

the substance that controls the quantity of product that can form in a chemical reaction

limiting reactant

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21

the substance that is not used up completely in a reaction

excess reactant

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22

gas that exhibits the five postulates of the kinetic molecular theory,

ideal gas

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23

PV=nRT

Ideal Gas Law

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24

the average kinetic energy of particles in a substance

Temperature

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25

A solution of known concentration is used to determine the concentration of another solution.

Titration

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26

the point at which the indicator changes color

end point of titration

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27

A compound that changes color in the presence of an acid or a base

indicator

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28

A subatomic particle that has a positive charge and is found in the nucleus of an atom

Proton

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29

negatively charged subatomic particles

Electrons

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30

element with unstable isotopes

radioactive element

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31

a region of space in which there is a high probability of finding an electron

atomic orbital

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32
  1. Vaporisation 2.Ionisation 3.Acceleration 4.Ion drift 5.Detection

Mass spectrometer steps

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33

an instrument used to measure the precise masses and relative amounts of ions

mass spectrometer

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34

An atom that has absorbed energy

excited atom

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35

wide range of radiation

electromagnetic spectrum

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36

shorter

the higher the frequency, the ___ the wavelength

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37

more

the higher the frequency, the --- energy

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38

atomic theory

Dalton

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39

discovered the electron

JJ Thomson

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40

discovered the nucleus

Rutherford

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41

The distance between two corresponding parts of a wave

Wavelength

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42

the number of waves that pass a point in one second.

frequency

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43

inversely proportional

frequency and wavelength are

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44

separation of the white light into its component colours

dispersion

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45

electrons absorb and energy and transfer to a higher energy level

Absorption line spectra are produced when

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46

electrons emit energy and transfer to a lower energy level.

Emission line spectra are produced when

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47

The highest-energy end of each series of spectral lines

Convergence limit

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48

the energy required to remove an electron from an atom

Ionisation energy

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49

energy required to remove one mole of electrons from one mole of gaseous atoms to produce one mole of gaseous 1+ ions.

first ionization energy

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50

greater

The closer to the nucleus the ________ the ionization energy.

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51

the distance from the center of an atom's nucleus to its outermost electron

atomic radius

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52

nuclear charge

affects all trends

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53

the weaker the attraction

the more inner electrons

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54

increases across a period

effective nuclear charge trend

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55

increases down a group, decreases across a period

atomic radius trend

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56

decreases across a period and increases down a group

Ionic Radius Trend

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57

smaller

cations are _____ than their parent atoms

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58

bigger

anions are ____ than their parent atoms

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59

decreases down a group, increases across a period

ionization energy trend

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60

increases across a period, decreases down a group

electron affinity trend

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61

a measure of the attraction of an atom for a bonding pair of electrons

Electronegativety

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62

increases across a period, decreases down a group

electronegativity trend

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63

decreases across a period and increases down a group

metallic character trend

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64

the more metallic

the easier to lose electrons

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