c1-atomic structure

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    Created by
    lily young

    Cards (142)

    • what is an atom?
      the smallest possible piece of an element
      has a radius of 0.1nm
    • what is an element?
      a substance in which all the atoms have the same atomic number
    • what is an isotope?
      atoms with the same number of protons but different numbers of neutrons
    • what is a molecule?
      two or more atoms bonded together
    • what is a compound?
      two or more different atoms bonded together
    • what is a mixture?
      at least two different elements or compounds together
      can be separated easily
    • what is a nucleus
      the centre of an atom
      contains protons and neutrons
    • what is a proton?
      a positively charged particle found in the nucleus
    • what is a neutron?
      a neutral particle found in the nucleus
      has no charge
    • what is an electron?
      a negatively charged particle found in energy levels (shells) around the nucleus
    • what is the relative mass of a proton and a neutron?
      1
    • what is the relative mass of an electron?
      0
    • what is the relative charge of a proton?
      +1
    • what is the relative charge of a neutron?
      0
    • what is the relative charge of an electron?
      -1
    • who discovered atoms?
      john dalton
    • who discovered the electron?
      JJ thompson
    • who discovered the nucleus
      rutherford
    • who discovered the neutron?
      james chadwick
    • who discovered energy levels (shells)?
      neils bohr
    • who invented the periodic table?
      dmitri mendeleev
    • how is the periodic table arranged?
      in order of atomic mass, and by their chemical properties
    • is the density of metals high or low?
      high
    • is the density of non-metals high or low?
      low
    • is the strength of metals strong or weak?
      strong
    • is the strength of non-metals strong or weak?
      weak
    • what does malleable mean?
      bend without breaking
    • what does brittle mean?
      break or shatter when hammered
    • are metals malleable or brittle?
      malleable
    • are non-metals malleable or brittle?
      brittle
    • is the conduction of heat good or bad in metals?
      good
    • is the conduction of heat good or bad in non-metals?
      bad (they are insulators)
    • is the conduction of electricity good or bad in metals?
      good
    • is the conduction of electricity good or bad in non-metals?
      bad (they are insulators)
      apart from graphite
    • electron arrangement rules
      always fill from the inside to the outside
      the first shell can only hold 2 electrons
      the second and third shells can hold 8
    • what happens to the melting point as you go down group 1?
      it decreases
    • what happens to the density as you go down group 1?
      it increases
    • what happens to the reactivity as you go down group 1?
      it increases
    • what happens to the melting point as you go down group 7?
      it increases
    • what happens to the density as you go down group 7?
      it increases
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