bonding

• what is an atom?


  The basic unit of matter.
• what is atomic structure?

  Protons, neutrons, electrons
• what are protons?


  Subatomic particles with a positive charge.
• what are electrons?


  Subatomic particles with a negative charge.
• what are neutrons?


  Subatomic particles with no charge.
• what is the mass of a proton?

  1
• what is the mass of a neutron?

  -1
• what is the mass of an electron?

  very small
• what is an atomic number?

  The number of protons in an atom.
• what is an element?

  A pure substance made of only one kind of atom and that cannot be broken down into simpler substances.
• what is atomic mass?

  the sum of the mass (number) of the neutrons and protons of an element.
• what is the mass number?

  The total number of protons and neutrons in an atom's nucleus.
• what is an ion?

  An ion is an atom or molecule that has gained or lost electrons, resulting in a positive or negative charge.
• what is a molecule?


  A group of atoms bonded together.
• what is a compound?


  A compound is a substance made up of two or more different elements chemically bonded together.
• what is a mixture?

  A combination of two or more substances that are not chemically bonded.
• what is an isotope?


  An isotope is a variant of an element that has the same number of protons but a different number of neutrons in its nucleus.
• 3 properties of an ionic compound?

  high melting & boiling point, high solubility, can conduct electricity when molten or in a solution
• 3 properties of a covalent compound?

  low melting & boiling point, insoluble, cannot conduct electricity
• name 3 properties of metallic compounds?

  high melting & boiling point, conducts heat & electricity well, malleable