Atoms and how atoms combine

Cards (30)

  • what is an element?

    substance which are made from only one type of atom
  • what are atoms made up of?

    protons, neutrons and electrons
  • where are electrons located?
    outside the nucleus
  • where are protons and neutrons located?
    inside the nucleus
  • what is the charge of a proton?
    positive
  • what is the charge of a neutron?
    neutral
  • what is the charge of an electron?
    negative
  • why are all atoms neutral?

    they contain an equal number of positive protons and negative electrons
  • what is an atomic number?
    number of protons in an atom
  • what is a mass number?
    number of protons and neutrons
  • how do you figure out the number of neutrons?
    mass number - atomic number
  • where is the atomic number located in a symbol?

    bottom
  • where is the mass number located in a symbol?

    top
  • what are energy levels?
    places where electrons are found
  • why do elements in the same groups have similar chemical properties?
    they have the same number of outer electrons
  • what is an isotope?
    atoms which have the same atomic number but different mass numbers
  • what is relative atomic mass?

    the average mass of an atom of an element
  • what is a compound?

    a substance formed when two or more different types of atom chemically join together
  • what is a molecule?

    a group of non-metal atoms which are chemically joined together
  • what does diatomic mean?

    joined together
  • what does monatomic mean?

    a single atom
  • what is a stable electron arrangement?

    the full outer energy levels which make the noble gases unreactive or stable
  • what is a covalent bond?

    a chemical bond formed when two or atoms share electrons
  • when is a double covalent bond formed?

    when two pairs of electrons are shared between two atoms
  • when is a triple covalent bond formed?

    when three pairs of electrons are shared between two atoms
  • how can some molecular formulas be worked out?

    by the name
  • what are the covalent network figures?
    diamond (carbon) and silicon dioxide
  • The nucleus is the central part of an atom, containing protons and neutrons.
  • Protons have a positive charge (+1) and are located in the nucleus.
  • Neutrons do not carry any electrical charge.