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chemistry prelim reviewer
  • Marvin Cerafica

  • 問題数 45 • 2/4/2024

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    問題一覧

  • 1

    All ________ is particulate in nature.

    matter

  • 2

    _____is the fourth state of matter

    plasma

  • 3

    can exist in one of three main states: solid, liquid, or gas.

    matter

  • 4

    is an ionized gas, a gas into which sufficient energy is provided to free electrons from atoms or molecules and to allow both species, ions and electrons, to coexist.

    plasma

  • 5

    ________is composed of tightly packed particles

    solid matter

  • 6

    _________is made of more loosely packed particles

    liquid matter

  • 7

    ___________is composed of particles packed so loosely that it has neither a defined shape nor a defined volume.

    gaseous matter

  • 8

    _________such as density and colour, do not depend on the amount of the substance present.

    intensive properties

  • 9

    ___________can be measured without changing a substance's chemical identity

    physical properties

  • 10

    __________ can be measured only by changing a substance's chemical identity

    chemical properties

  • 11

    The most basic form of filtration is using gravity to filter a mixture

    general filtration

  • 12

    Chemical laboratory process used to separate mixtures.

    decanting

  • 13

    You can filter sea water to remove any debris and slowly evaporate the water by heating the filtrate in an evaporating dish until salt crystals start forming

    evaporation

  • 14

    Uses gravity and centrifugal force to separate particles heavier than the liquid medium

    centrifugation

  • 15

    _____ spin the material at high rotation speeds and separate the particulate from the liquid.

    centrifuges

  • 16

    Is a method used by scientists for separating organic and inorganic compounds so that they can be analyzed and studied.

    chromatography

  • 17

    __________is the process of separating suspended solid matter from a liquid, by causing the latter to pass through the pores of some substance, called a filter.

    filtration

  • 18

    what are the different types of measurement scales

    nominal, ordinal, interval, ratio

  • 19

    It involves assigning numbers to characteristics of objects or events in such a way that the numbers reflect reality.

    measurement

  • 20

    Is how close measure values are to each other, basically how many decimal places are at the end of a given measurement.

    precision

  • 21

    Is how close a measure value is to the true value.

    accuracy

  • 22

    Accuracy matters too, but it's best when measurements are both precise and accurate

    true

  • 23

    ______is defined as the difference between the true or actual value and the measured value.

    measurement error

  • 24

    ______are the number of digits in a value, often a measurement, that contribute to the degree of accuracy of the value.

    significant figures

  • 25

    ___________is the mass of an object divided by its volume.

    density

  • 26

    All matter is made up of tiny particles called______

    atom

  • 27

    Each atom is made up of smaller particles______,______,______

    electron, proton, neutron

  • 28

    States that matter can neither be created nor destroyed. This law was put forth by Antoine Lavoisier 1789

    law of conservation of mass

  • 29

    This law was given by a French chemist joseph proust. He stated that a given compound always contains exactly the same proportion of element by weight.

    law of definite proportions

  • 30

    two or more elements can combine to form different compounds in whole-number ratios

    law of multiple proportions

  • 31

    In atomic physics and quantum chemistry, the electron configuration is the distribution of electrons of an atom or molecule (or other physical structure) in atomic or molecular orbitals.

    atomic structure

  • 32

    is a subatomic particle, symbol e⁻ or β⁻ , whose electric charge is negative one elementary charge

    electron

  • 33

    is a subatomic particle, symbol p or p⁺ , with a positive electric charge of +1e elementary charge and a mass slightly less than that of a neutron

    proton

  • 34

    is a subatomic particle, symbol n or n⁰ , with no electric charge and a mass slightly greater than that of a proton

    neutron

  • 35

    Are neutral particles made of two or more atoms bonded together.

    molecules

  • 36

    Is a positively or negatively charged particle.

    ion

  • 37

    the ion that losses e

    cation

  • 38

    the ion that gains e

    anion

  • 39

    _______ are the elements that have the same atomic no. but different in atomic mass.

    isotopes

  • 40

    A set of chemical symbols showing the elements present in a compound and their relative proportions and in some cases the structure of the compound.

    chemical formulas

  • 41

    ________Is the calculation of reactants and products in chemical reactions

    stoichiometry

  • 42

    It is used as the bridge between chemistry on the atomic and macroscopic scale

    atomic mass

  • 43

    The concept of the mole can be used to convert between mass and number of particles.

    avogadros no

  • 44

    The number 6.022 × 10²³ is known as________

    avogadros number

  • 45

    __________is calculated from a molecular formula by dividing the mass of a single element in one mole of a compound by the mass of one mole of the entire compound.

    percent composition