C1

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Created by
Nicky Wilson

Subdecks (4)

Cards (92)

  • What is an atom?

    An atom is the smallest part of an element (Can be divisible)
  • How are atoms represented
    Chemical Symbols
  • How many elements are there?
    Around 100
  • How are Compounds formed?
    Chemical Reactions
  • What is a Chemical Reaction?
    Formation of one or more new substances through energy change
  • What are Compounds?
    • Substance containing two or more elements
    • They are always chemically combined
    • They always have fixed proportions
  • How can compounds be separated?
    Chemical reactions
  • What is a mixture?
    Two (or more) Elements or compounds not chemically combined.
    The properties of each substance is unchanged
  • How can mixtures be separated?
    • Filtration
    • Crystallisation
    • Simple Distillation
    • Fractional Distillation
    • Chromatography
  • Describe the plum pudding model
    Ball of positive charge with electrons embedded in it
  • What was concluded during the Alpha Particle Scattering experiment?
    The mass of the atom was concentrated at the centre
    The nucleus was positively charged
  • What model replaced the plum pudding model?
    Nuclear model
  • How did Niels Bohr adapt the nuclear model?
    He suggested that electrons orbit the nucleus at specific distances
  • What did James Chadwick discover?
    The existence of neutrons within the nucleus
  • Relative Charge of Proton?
    +1
  • Relative Charge of Neutron?
    0
  • Relative charge of electron?
    -1
  • Why do atoms have no overall charge?
    The number of electrons is equal to the number of protons in the nucleus.
  • What is represented by the atomic number?
    The number of protons in the nucleus
  • What is the radius of an atom?
    0.10 nm OR 1×10^(-3 )
  • What is the radius of a nucleus?
    1 × 10^(-14)
  • What is the mass of electrons?
    Negligible μ(n)
  • What are isotopes?

    Atoms of the same element with a different number of neutrons
  • How many electrons can occupy the first shell of an atom?
    2
  • How many electrons can occupy the second shell of an atom?
    8
  • How many electrons can occupy the third shell of an atom?
    8